| """This module tests SyntaxErrors. |
| |
| Here's an example of the sort of thing that is tested. |
| |
| >>> def f(x): |
| ... global x |
| Traceback (most recent call last): |
| SyntaxError: name 'x' is parameter and global |
| |
| The tests are all raise SyntaxErrors. They were created by checking |
| each C call that raises SyntaxError. There are several modules that |
| raise these exceptions-- ast.c, compile.c, future.c, pythonrun.c, and |
| symtable.c. |
| |
| The parser itself outlaws a lot of invalid syntax. None of these |
| errors are tested here at the moment. We should add some tests; since |
| there are infinitely many programs with invalid syntax, we would need |
| to be judicious in selecting some. |
| |
| The compiler generates a synthetic module name for code executed by |
| doctest. Since all the code comes from the same module, a suffix like |
| [1] is appended to the module name, As a consequence, changing the |
| order of tests in this module means renumbering all the errors after |
| it. (Maybe we should enable the ellipsis option for these tests.) |
| |
| In ast.c, syntax errors are raised by calling ast_error(). |
| |
| Errors from set_context(): |
| |
| >>> obj.None = 1 |
| Traceback (most recent call last): |
| SyntaxError: invalid syntax |
| |
| >>> None = 1 |
| Traceback (most recent call last): |
| SyntaxError: cannot assign to None |
| |
| >>> obj.True = 1 |
| Traceback (most recent call last): |
| SyntaxError: invalid syntax |
| |
| >>> True = 1 |
| Traceback (most recent call last): |
| SyntaxError: cannot assign to True |
| |
| >>> (True := 1) |
| Traceback (most recent call last): |
| SyntaxError: cannot use assignment expressions with True |
| |
| >>> obj.__debug__ = 1 |
| Traceback (most recent call last): |
| SyntaxError: cannot assign to __debug__ |
| |
| >>> __debug__ = 1 |
| Traceback (most recent call last): |
| SyntaxError: cannot assign to __debug__ |
| |
| >>> (__debug__ := 1) |
| Traceback (most recent call last): |
| SyntaxError: cannot assign to __debug__ |
| |
| >>> del __debug__ |
| Traceback (most recent call last): |
| SyntaxError: cannot delete __debug__ |
| |
| >>> f() = 1 |
| Traceback (most recent call last): |
| SyntaxError: cannot assign to function call here. Maybe you meant '==' instead of '='? |
| |
| >>> yield = 1 |
| Traceback (most recent call last): |
| SyntaxError: assignment to yield expression not possible |
| |
| >>> del f() |
| Traceback (most recent call last): |
| SyntaxError: cannot delete function call |
| |
| >>> a + 1 = 2 |
| Traceback (most recent call last): |
| SyntaxError: cannot assign to expression here. Maybe you meant '==' instead of '='? |
| |
| >>> (x for x in x) = 1 |
| Traceback (most recent call last): |
| SyntaxError: cannot assign to generator expression |
| |
| >>> 1 = 1 |
| Traceback (most recent call last): |
| SyntaxError: cannot assign to literal here. Maybe you meant '==' instead of '='? |
| |
| >>> "abc" = 1 |
| Traceback (most recent call last): |
| SyntaxError: cannot assign to literal here. Maybe you meant '==' instead of '='? |
| |
| >>> b"" = 1 |
| Traceback (most recent call last): |
| SyntaxError: cannot assign to literal here. Maybe you meant '==' instead of '='? |
| |
| >>> ... = 1 |
| Traceback (most recent call last): |
| SyntaxError: cannot assign to ellipsis here. Maybe you meant '==' instead of '='? |
| |
| >>> `1` = 1 |
| Traceback (most recent call last): |
| SyntaxError: invalid syntax |
| |
| If the left-hand side of an assignment is a list or tuple, an illegal |
| expression inside that contain should still cause a syntax error. |
| This test just checks a couple of cases rather than enumerating all of |
| them. |
| |
| >>> (a, "b", c) = (1, 2, 3) |
| Traceback (most recent call last): |
| SyntaxError: cannot assign to literal |
| |
| >>> (a, True, c) = (1, 2, 3) |
| Traceback (most recent call last): |
| SyntaxError: cannot assign to True |
| |
| >>> (a, __debug__, c) = (1, 2, 3) |
| Traceback (most recent call last): |
| SyntaxError: cannot assign to __debug__ |
| |
| >>> (a, *True, c) = (1, 2, 3) |
| Traceback (most recent call last): |
| SyntaxError: cannot assign to True |
| |
| >>> (a, *__debug__, c) = (1, 2, 3) |
| Traceback (most recent call last): |
| SyntaxError: cannot assign to __debug__ |
| |
| >>> [a, b, c + 1] = [1, 2, 3] |
| Traceback (most recent call last): |
| SyntaxError: cannot assign to expression |
| |
| >>> [a, b[1], c + 1] = [1, 2, 3] |
| Traceback (most recent call last): |
| SyntaxError: cannot assign to expression |
| |
| >>> [a, b.c.d, c + 1] = [1, 2, 3] |
| Traceback (most recent call last): |
| SyntaxError: cannot assign to expression |
| |
| >>> a if 1 else b = 1 |
| Traceback (most recent call last): |
| SyntaxError: cannot assign to conditional expression |
| |
| >>> a = 42 if True |
| Traceback (most recent call last): |
| SyntaxError: expected 'else' after 'if' expression |
| |
| >>> a = (42 if True) |
| Traceback (most recent call last): |
| SyntaxError: expected 'else' after 'if' expression |
| |
| >>> a = [1, 42 if True, 4] |
| Traceback (most recent call last): |
| SyntaxError: expected 'else' after 'if' expression |
| |
| >>> if True: |
| ... print("Hello" |
| ... |
| ... if 2: |
| ... print(123)) |
| Traceback (most recent call last): |
| SyntaxError: invalid syntax |
| |
| >>> True = True = 3 |
| Traceback (most recent call last): |
| SyntaxError: cannot assign to True |
| |
| >>> x = y = True = z = 3 |
| Traceback (most recent call last): |
| SyntaxError: cannot assign to True |
| |
| >>> x = y = yield = 1 |
| Traceback (most recent call last): |
| SyntaxError: assignment to yield expression not possible |
| |
| >>> a, b += 1, 2 |
| Traceback (most recent call last): |
| SyntaxError: 'tuple' is an illegal expression for augmented assignment |
| |
| >>> (a, b) += 1, 2 |
| Traceback (most recent call last): |
| SyntaxError: 'tuple' is an illegal expression for augmented assignment |
| |
| >>> [a, b] += 1, 2 |
| Traceback (most recent call last): |
| SyntaxError: 'list' is an illegal expression for augmented assignment |
| |
| Invalid targets in `for` loops and `with` statements should also |
| produce a specialized error message |
| |
| >>> for a() in b: pass |
| Traceback (most recent call last): |
| SyntaxError: cannot assign to function call |
| |
| >>> for (a, b()) in b: pass |
| Traceback (most recent call last): |
| SyntaxError: cannot assign to function call |
| |
| >>> for [a, b()] in b: pass |
| Traceback (most recent call last): |
| SyntaxError: cannot assign to function call |
| |
| >>> for (*a, b, c+1) in b: pass |
| Traceback (most recent call last): |
| SyntaxError: cannot assign to expression |
| |
| >>> for (x, *(y, z.d())) in b: pass |
| Traceback (most recent call last): |
| SyntaxError: cannot assign to function call |
| |
| >>> for a, b() in c: pass |
| Traceback (most recent call last): |
| SyntaxError: cannot assign to function call |
| |
| >>> for a, b, (c + 1, d()): pass |
| Traceback (most recent call last): |
| SyntaxError: cannot assign to expression |
| |
| >>> for i < (): pass |
| Traceback (most recent call last): |
| SyntaxError: invalid syntax |
| |
| >>> for a, b |
| Traceback (most recent call last): |
| SyntaxError: invalid syntax |
| |
| >>> with a as b(): pass |
| Traceback (most recent call last): |
| SyntaxError: cannot assign to function call |
| |
| >>> with a as (b, c()): pass |
| Traceback (most recent call last): |
| SyntaxError: cannot assign to function call |
| |
| >>> with a as [b, c()]: pass |
| Traceback (most recent call last): |
| SyntaxError: cannot assign to function call |
| |
| >>> with a as (*b, c, d+1): pass |
| Traceback (most recent call last): |
| SyntaxError: cannot assign to expression |
| |
| >>> with a as (x, *(y, z.d())): pass |
| Traceback (most recent call last): |
| SyntaxError: cannot assign to function call |
| |
| >>> with a as b, c as d(): pass |
| Traceback (most recent call last): |
| SyntaxError: cannot assign to function call |
| |
| >>> with a as b |
| Traceback (most recent call last): |
| SyntaxError: expected ':' |
| |
| >>> p = p = |
| Traceback (most recent call last): |
| SyntaxError: invalid syntax |
| |
| Comprehensions creating tuples without parentheses |
| should produce a specialized error message: |
| |
| >>> [x,y for x,y in range(100)] |
| Traceback (most recent call last): |
| SyntaxError: did you forget parentheses around the comprehension target? |
| |
| >>> {x,y for x,y in range(100)} |
| Traceback (most recent call last): |
| SyntaxError: did you forget parentheses around the comprehension target? |
| |
| # Missing commas in literals collections should not |
| # produce special error messages regarding missing |
| # parentheses, but about missing commas instead |
| |
| >>> [1, 2 3] |
| Traceback (most recent call last): |
| SyntaxError: invalid syntax. Perhaps you forgot a comma? |
| |
| >>> {1, 2 3} |
| Traceback (most recent call last): |
| SyntaxError: invalid syntax. Perhaps you forgot a comma? |
| |
| >>> {1:2, 2:5 3:12} |
| Traceback (most recent call last): |
| SyntaxError: invalid syntax. Perhaps you forgot a comma? |
| |
| >>> (1, 2 3) |
| Traceback (most recent call last): |
| SyntaxError: invalid syntax. Perhaps you forgot a comma? |
| |
| # Make sure soft keywords constructs don't raise specialized |
| # errors regarding missing commas or other spezialiced errors |
| |
| >>> match x: |
| ... y = 3 |
| Traceback (most recent call last): |
| SyntaxError: invalid syntax |
| |
| >>> match x: |
| ... case y: |
| ... 3 $ 3 |
| Traceback (most recent call last): |
| SyntaxError: invalid syntax |
| |
| >>> match x: |
| ... case $: |
| ... ... |
| Traceback (most recent call last): |
| SyntaxError: invalid syntax |
| |
| >>> match ...: |
| ... case {**rest, "key": value}: |
| ... ... |
| Traceback (most recent call last): |
| SyntaxError: invalid syntax |
| |
| >>> match ...: |
| ... case {**_}: |
| ... ... |
| Traceback (most recent call last): |
| SyntaxError: invalid syntax |
| |
| From compiler_complex_args(): |
| |
| >>> def f(None=1): |
| ... pass |
| Traceback (most recent call last): |
| SyntaxError: invalid syntax |
| |
| From ast_for_arguments(): |
| |
| >>> def f(x, y=1, z): |
| ... pass |
| Traceback (most recent call last): |
| SyntaxError: non-default argument follows default argument |
| |
| >>> def f(x, None): |
| ... pass |
| Traceback (most recent call last): |
| SyntaxError: invalid syntax |
| |
| >>> def f(*None): |
| ... pass |
| Traceback (most recent call last): |
| SyntaxError: invalid syntax |
| |
| >>> def f(**None): |
| ... pass |
| Traceback (most recent call last): |
| SyntaxError: invalid syntax |
| |
| >>> def foo(/,a,b=,c): |
| ... pass |
| Traceback (most recent call last): |
| SyntaxError: at least one argument must precede / |
| |
| >>> def foo(a,/,/,b,c): |
| ... pass |
| Traceback (most recent call last): |
| SyntaxError: / may appear only once |
| |
| >>> def foo(a,/,a1,/,b,c): |
| ... pass |
| Traceback (most recent call last): |
| SyntaxError: / may appear only once |
| |
| >>> def foo(a=1,/,/,*b,/,c): |
| ... pass |
| Traceback (most recent call last): |
| SyntaxError: / may appear only once |
| |
| >>> def foo(a,/,a1=1,/,b,c): |
| ... pass |
| Traceback (most recent call last): |
| SyntaxError: / may appear only once |
| |
| >>> def foo(a,*b,c,/,d,e): |
| ... pass |
| Traceback (most recent call last): |
| SyntaxError: / must be ahead of * |
| |
| >>> def foo(a=1,*b,c=3,/,d,e): |
| ... pass |
| Traceback (most recent call last): |
| SyntaxError: / must be ahead of * |
| |
| >>> def foo(a,*b=3,c): |
| ... pass |
| Traceback (most recent call last): |
| SyntaxError: var-positional argument cannot have default value |
| |
| >>> def foo(a,*b: int=,c): |
| ... pass |
| Traceback (most recent call last): |
| SyntaxError: var-positional argument cannot have default value |
| |
| >>> def foo(a,**b=3): |
| ... pass |
| Traceback (most recent call last): |
| SyntaxError: var-keyword argument cannot have default value |
| |
| >>> def foo(a,**b: int=3): |
| ... pass |
| Traceback (most recent call last): |
| SyntaxError: var-keyword argument cannot have default value |
| |
| >>> def foo(a,*a, b, **c, d): |
| ... pass |
| Traceback (most recent call last): |
| SyntaxError: arguments cannot follow var-keyword argument |
| |
| >>> def foo(a,*a, b, **c, d=4): |
| ... pass |
| Traceback (most recent call last): |
| SyntaxError: arguments cannot follow var-keyword argument |
| |
| >>> def foo(a,*a, b, **c, *d): |
| ... pass |
| Traceback (most recent call last): |
| SyntaxError: arguments cannot follow var-keyword argument |
| |
| >>> def foo(a,*a, b, **c, **d): |
| ... pass |
| Traceback (most recent call last): |
| SyntaxError: arguments cannot follow var-keyword argument |
| |
| >>> def foo(a=1,/,**b,/,c): |
| ... pass |
| Traceback (most recent call last): |
| SyntaxError: arguments cannot follow var-keyword argument |
| |
| >>> def foo(*b,*d): |
| ... pass |
| Traceback (most recent call last): |
| SyntaxError: * argument may appear only once |
| |
| >>> def foo(a,*b,c,*d,*e,c): |
| ... pass |
| Traceback (most recent call last): |
| SyntaxError: * argument may appear only once |
| |
| >>> def foo(a,b,/,c,*b,c,*d,*e,c): |
| ... pass |
| Traceback (most recent call last): |
| SyntaxError: * argument may appear only once |
| |
| >>> def foo(a,b,/,c,*b,c,*d,**e): |
| ... pass |
| Traceback (most recent call last): |
| SyntaxError: * argument may appear only once |
| |
| >>> def foo(a=1,/*,b,c): |
| ... pass |
| Traceback (most recent call last): |
| SyntaxError: expected comma between / and * |
| |
| >>> def foo(a=1,d=,c): |
| ... pass |
| Traceback (most recent call last): |
| SyntaxError: expected default value expression |
| |
| >>> def foo(a,d=,c): |
| ... pass |
| Traceback (most recent call last): |
| SyntaxError: expected default value expression |
| |
| >>> def foo(a,d: int=,c): |
| ... pass |
| Traceback (most recent call last): |
| SyntaxError: expected default value expression |
| |
| >>> lambda /,a,b,c: None |
| Traceback (most recent call last): |
| SyntaxError: at least one argument must precede / |
| |
| >>> lambda a,/,/,b,c: None |
| Traceback (most recent call last): |
| SyntaxError: / may appear only once |
| |
| >>> lambda a,/,a1,/,b,c: None |
| Traceback (most recent call last): |
| SyntaxError: / may appear only once |
| |
| >>> lambda a=1,/,/,*b,/,c: None |
| Traceback (most recent call last): |
| SyntaxError: / may appear only once |
| |
| >>> lambda a,/,a1=1,/,b,c: None |
| Traceback (most recent call last): |
| SyntaxError: / may appear only once |
| |
| >>> lambda a,*b,c,/,d,e: None |
| Traceback (most recent call last): |
| SyntaxError: / must be ahead of * |
| |
| >>> lambda a=1,*b,c=3,/,d,e: None |
| Traceback (most recent call last): |
| SyntaxError: / must be ahead of * |
| |
| >>> lambda a=1,/*,b,c: None |
| Traceback (most recent call last): |
| SyntaxError: expected comma between / and * |
| |
| >>> lambda a,*b=3,c: None |
| Traceback (most recent call last): |
| SyntaxError: var-positional argument cannot have default value |
| |
| >>> lambda a,**b=3: None |
| Traceback (most recent call last): |
| SyntaxError: var-keyword argument cannot have default value |
| |
| >>> lambda a, *a, b, **c, d: None |
| Traceback (most recent call last): |
| SyntaxError: arguments cannot follow var-keyword argument |
| |
| >>> lambda a,*a, b, **c, d=4: None |
| Traceback (most recent call last): |
| SyntaxError: arguments cannot follow var-keyword argument |
| |
| >>> lambda a,*a, b, **c, *d: None |
| Traceback (most recent call last): |
| SyntaxError: arguments cannot follow var-keyword argument |
| |
| >>> lambda a,*a, b, **c, **d: None |
| Traceback (most recent call last): |
| SyntaxError: arguments cannot follow var-keyword argument |
| |
| >>> lambda a=1,/,**b,/,c: None |
| Traceback (most recent call last): |
| SyntaxError: arguments cannot follow var-keyword argument |
| |
| >>> lambda *b,*d: None |
| Traceback (most recent call last): |
| SyntaxError: * argument may appear only once |
| |
| >>> lambda a,*b,c,*d,*e,c: None |
| Traceback (most recent call last): |
| SyntaxError: * argument may appear only once |
| |
| >>> lambda a,b,/,c,*b,c,*d,*e,c: None |
| Traceback (most recent call last): |
| SyntaxError: * argument may appear only once |
| |
| >>> lambda a,b,/,c,*b,c,*d,**e: None |
| Traceback (most recent call last): |
| SyntaxError: * argument may appear only once |
| |
| >>> lambda a=1,d=,c: None |
| Traceback (most recent call last): |
| SyntaxError: expected default value expression |
| |
| >>> lambda a,d=,c: None |
| Traceback (most recent call last): |
| SyntaxError: expected default value expression |
| |
| >>> import ast; ast.parse(''' |
| ... def f( |
| ... *, # type: int |
| ... a, # type: int |
| ... ): |
| ... pass |
| ... ''', type_comments=True) |
| Traceback (most recent call last): |
| SyntaxError: bare * has associated type comment |
| |
| |
| From ast_for_funcdef(): |
| |
| >>> def None(x): |
| ... pass |
| Traceback (most recent call last): |
| SyntaxError: invalid syntax |
| |
| |
| From ast_for_call(): |
| |
| >>> def f(it, *varargs, **kwargs): |
| ... return list(it) |
| >>> L = range(10) |
| >>> f(x for x in L) |
| [0, 1, 2, 3, 4, 5, 6, 7, 8, 9] |
| >>> f(x for x in L, 1) |
| Traceback (most recent call last): |
| SyntaxError: Generator expression must be parenthesized |
| >>> f(x for x in L, y=1) |
| Traceback (most recent call last): |
| SyntaxError: Generator expression must be parenthesized |
| >>> f(x for x in L, *[]) |
| Traceback (most recent call last): |
| SyntaxError: Generator expression must be parenthesized |
| >>> f(x for x in L, **{}) |
| Traceback (most recent call last): |
| SyntaxError: Generator expression must be parenthesized |
| >>> f(L, x for x in L) |
| Traceback (most recent call last): |
| SyntaxError: Generator expression must be parenthesized |
| >>> f(x for x in L, y for y in L) |
| Traceback (most recent call last): |
| SyntaxError: Generator expression must be parenthesized |
| >>> f(x for x in L,) |
| Traceback (most recent call last): |
| SyntaxError: Generator expression must be parenthesized |
| >>> f((x for x in L), 1) |
| [0, 1, 2, 3, 4, 5, 6, 7, 8, 9] |
| >>> class C(x for x in L): |
| ... pass |
| Traceback (most recent call last): |
| SyntaxError: invalid syntax |
| |
| >>> def g(*args, **kwargs): |
| ... print(args, sorted(kwargs.items())) |
| >>> g(0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, |
| ... 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, |
| ... 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, |
| ... 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, |
| ... 74, 75, 76, 77, 78, 79, 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, |
| ... 92, 93, 94, 95, 96, 97, 98, 99, 100, 101, 102, 103, 104, 105, 106, 107, |
| ... 108, 109, 110, 111, 112, 113, 114, 115, 116, 117, 118, 119, 120, 121, |
| ... 122, 123, 124, 125, 126, 127, 128, 129, 130, 131, 132, 133, 134, 135, |
| ... 136, 137, 138, 139, 140, 141, 142, 143, 144, 145, 146, 147, 148, 149, |
| ... 150, 151, 152, 153, 154, 155, 156, 157, 158, 159, 160, 161, 162, 163, |
| ... 164, 165, 166, 167, 168, 169, 170, 171, 172, 173, 174, 175, 176, 177, |
| ... 178, 179, 180, 181, 182, 183, 184, 185, 186, 187, 188, 189, 190, 191, |
| ... 192, 193, 194, 195, 196, 197, 198, 199, 200, 201, 202, 203, 204, 205, |
| ... 206, 207, 208, 209, 210, 211, 212, 213, 214, 215, 216, 217, 218, 219, |
| ... 220, 221, 222, 223, 224, 225, 226, 227, 228, 229, 230, 231, 232, 233, |
| ... 234, 235, 236, 237, 238, 239, 240, 241, 242, 243, 244, 245, 246, 247, |
| ... 248, 249, 250, 251, 252, 253, 254, 255, 256, 257, 258, 259, 260, 261, |
| ... 262, 263, 264, 265, 266, 267, 268, 269, 270, 271, 272, 273, 274, 275, |
| ... 276, 277, 278, 279, 280, 281, 282, 283, 284, 285, 286, 287, 288, 289, |
| ... 290, 291, 292, 293, 294, 295, 296, 297, 298, 299) # doctest: +ELLIPSIS |
| (0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, ..., 297, 298, 299) [] |
| |
| >>> g(a000=0, a001=1, a002=2, a003=3, a004=4, a005=5, a006=6, a007=7, a008=8, |
| ... a009=9, a010=10, a011=11, a012=12, a013=13, a014=14, a015=15, a016=16, |
| ... a017=17, a018=18, a019=19, a020=20, a021=21, a022=22, a023=23, a024=24, |
| ... a025=25, a026=26, a027=27, a028=28, a029=29, a030=30, a031=31, a032=32, |
| ... a033=33, a034=34, a035=35, a036=36, a037=37, a038=38, a039=39, a040=40, |
| ... a041=41, a042=42, a043=43, a044=44, a045=45, a046=46, a047=47, a048=48, |
| ... a049=49, a050=50, a051=51, a052=52, a053=53, a054=54, a055=55, a056=56, |
| ... a057=57, a058=58, a059=59, a060=60, a061=61, a062=62, a063=63, a064=64, |
| ... a065=65, a066=66, a067=67, a068=68, a069=69, a070=70, a071=71, a072=72, |
| ... a073=73, a074=74, a075=75, a076=76, a077=77, a078=78, a079=79, a080=80, |
| ... a081=81, a082=82, a083=83, a084=84, a085=85, a086=86, a087=87, a088=88, |
| ... a089=89, a090=90, a091=91, a092=92, a093=93, a094=94, a095=95, a096=96, |
| ... a097=97, a098=98, a099=99, a100=100, a101=101, a102=102, a103=103, |
| ... a104=104, a105=105, a106=106, a107=107, a108=108, a109=109, a110=110, |
| ... a111=111, a112=112, a113=113, a114=114, a115=115, a116=116, a117=117, |
| ... a118=118, a119=119, a120=120, a121=121, a122=122, a123=123, a124=124, |
| ... a125=125, a126=126, a127=127, a128=128, a129=129, a130=130, a131=131, |
| ... a132=132, a133=133, a134=134, a135=135, a136=136, a137=137, a138=138, |
| ... a139=139, a140=140, a141=141, a142=142, a143=143, a144=144, a145=145, |
| ... a146=146, a147=147, a148=148, a149=149, a150=150, a151=151, a152=152, |
| ... a153=153, a154=154, a155=155, a156=156, a157=157, a158=158, a159=159, |
| ... a160=160, a161=161, a162=162, a163=163, a164=164, a165=165, a166=166, |
| ... a167=167, a168=168, a169=169, a170=170, a171=171, a172=172, a173=173, |
| ... a174=174, a175=175, a176=176, a177=177, a178=178, a179=179, a180=180, |
| ... a181=181, a182=182, a183=183, a184=184, a185=185, a186=186, a187=187, |
| ... a188=188, a189=189, a190=190, a191=191, a192=192, a193=193, a194=194, |
| ... a195=195, a196=196, a197=197, a198=198, a199=199, a200=200, a201=201, |
| ... a202=202, a203=203, a204=204, a205=205, a206=206, a207=207, a208=208, |
| ... a209=209, a210=210, a211=211, a212=212, a213=213, a214=214, a215=215, |
| ... a216=216, a217=217, a218=218, a219=219, a220=220, a221=221, a222=222, |
| ... a223=223, a224=224, a225=225, a226=226, a227=227, a228=228, a229=229, |
| ... a230=230, a231=231, a232=232, a233=233, a234=234, a235=235, a236=236, |
| ... a237=237, a238=238, a239=239, a240=240, a241=241, a242=242, a243=243, |
| ... a244=244, a245=245, a246=246, a247=247, a248=248, a249=249, a250=250, |
| ... a251=251, a252=252, a253=253, a254=254, a255=255, a256=256, a257=257, |
| ... a258=258, a259=259, a260=260, a261=261, a262=262, a263=263, a264=264, |
| ... a265=265, a266=266, a267=267, a268=268, a269=269, a270=270, a271=271, |
| ... a272=272, a273=273, a274=274, a275=275, a276=276, a277=277, a278=278, |
| ... a279=279, a280=280, a281=281, a282=282, a283=283, a284=284, a285=285, |
| ... a286=286, a287=287, a288=288, a289=289, a290=290, a291=291, a292=292, |
| ... a293=293, a294=294, a295=295, a296=296, a297=297, a298=298, a299=299) |
| ... # doctest: +ELLIPSIS |
| () [('a000', 0), ('a001', 1), ('a002', 2), ..., ('a298', 298), ('a299', 299)] |
| |
| >>> class C: |
| ... def meth(self, *args): |
| ... return args |
| >>> obj = C() |
| >>> obj.meth( |
| ... 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, |
| ... 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, |
| ... 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, |
| ... 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, |
| ... 74, 75, 76, 77, 78, 79, 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, |
| ... 92, 93, 94, 95, 96, 97, 98, 99, 100, 101, 102, 103, 104, 105, 106, 107, |
| ... 108, 109, 110, 111, 112, 113, 114, 115, 116, 117, 118, 119, 120, 121, |
| ... 122, 123, 124, 125, 126, 127, 128, 129, 130, 131, 132, 133, 134, 135, |
| ... 136, 137, 138, 139, 140, 141, 142, 143, 144, 145, 146, 147, 148, 149, |
| ... 150, 151, 152, 153, 154, 155, 156, 157, 158, 159, 160, 161, 162, 163, |
| ... 164, 165, 166, 167, 168, 169, 170, 171, 172, 173, 174, 175, 176, 177, |
| ... 178, 179, 180, 181, 182, 183, 184, 185, 186, 187, 188, 189, 190, 191, |
| ... 192, 193, 194, 195, 196, 197, 198, 199, 200, 201, 202, 203, 204, 205, |
| ... 206, 207, 208, 209, 210, 211, 212, 213, 214, 215, 216, 217, 218, 219, |
| ... 220, 221, 222, 223, 224, 225, 226, 227, 228, 229, 230, 231, 232, 233, |
| ... 234, 235, 236, 237, 238, 239, 240, 241, 242, 243, 244, 245, 246, 247, |
| ... 248, 249, 250, 251, 252, 253, 254, 255, 256, 257, 258, 259, 260, 261, |
| ... 262, 263, 264, 265, 266, 267, 268, 269, 270, 271, 272, 273, 274, 275, |
| ... 276, 277, 278, 279, 280, 281, 282, 283, 284, 285, 286, 287, 288, 289, |
| ... 290, 291, 292, 293, 294, 295, 296, 297, 298, 299) # doctest: +ELLIPSIS |
| (0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, ..., 297, 298, 299) |
| |
| >>> f(lambda x: x[0] = 3) |
| Traceback (most recent call last): |
| SyntaxError: expression cannot contain assignment, perhaps you meant "=="? |
| |
| # Check that this error doesn't trigger for names: |
| >>> f(a={x: for x in {}}) |
| Traceback (most recent call last): |
| SyntaxError: invalid syntax |
| |
| The grammar accepts any test (basically, any expression) in the |
| keyword slot of a call site. Test a few different options. |
| |
| >>> f(x()=2) |
| Traceback (most recent call last): |
| SyntaxError: expression cannot contain assignment, perhaps you meant "=="? |
| >>> f(a or b=1) |
| Traceback (most recent call last): |
| SyntaxError: expression cannot contain assignment, perhaps you meant "=="? |
| >>> f(x.y=1) |
| Traceback (most recent call last): |
| SyntaxError: expression cannot contain assignment, perhaps you meant "=="? |
| >>> f((x)=2) |
| Traceback (most recent call last): |
| SyntaxError: expression cannot contain assignment, perhaps you meant "=="? |
| >>> f(True=1) |
| Traceback (most recent call last): |
| SyntaxError: cannot assign to True |
| >>> f(False=1) |
| Traceback (most recent call last): |
| SyntaxError: cannot assign to False |
| >>> f(None=1) |
| Traceback (most recent call last): |
| SyntaxError: cannot assign to None |
| >>> f(__debug__=1) |
| Traceback (most recent call last): |
| SyntaxError: cannot assign to __debug__ |
| >>> __debug__: int |
| Traceback (most recent call last): |
| SyntaxError: cannot assign to __debug__ |
| |
| |
| More set_context(): |
| |
| >>> (x for x in x) += 1 |
| Traceback (most recent call last): |
| SyntaxError: 'generator expression' is an illegal expression for augmented assignment |
| >>> None += 1 |
| Traceback (most recent call last): |
| SyntaxError: 'None' is an illegal expression for augmented assignment |
| >>> __debug__ += 1 |
| Traceback (most recent call last): |
| SyntaxError: cannot assign to __debug__ |
| >>> f() += 1 |
| Traceback (most recent call last): |
| SyntaxError: 'function call' is an illegal expression for augmented assignment |
| |
| |
| Test continue in finally in weird combinations. |
| |
| continue in for loop under finally should be ok. |
| |
| >>> def test(): |
| ... try: |
| ... pass |
| ... finally: |
| ... for abc in range(10): |
| ... continue |
| ... print(abc) |
| >>> test() |
| 9 |
| |
| continue in a finally should be ok. |
| |
| >>> def test(): |
| ... for abc in range(10): |
| ... try: |
| ... pass |
| ... finally: |
| ... continue |
| ... print(abc) |
| >>> test() |
| 9 |
| |
| >>> def test(): |
| ... for abc in range(10): |
| ... try: |
| ... pass |
| ... finally: |
| ... try: |
| ... continue |
| ... except: |
| ... pass |
| ... print(abc) |
| >>> test() |
| 9 |
| |
| >>> def test(): |
| ... for abc in range(10): |
| ... try: |
| ... pass |
| ... finally: |
| ... try: |
| ... pass |
| ... except: |
| ... continue |
| ... print(abc) |
| >>> test() |
| 9 |
| |
| A continue outside loop should not be allowed. |
| |
| >>> def foo(): |
| ... try: |
| ... pass |
| ... finally: |
| ... continue |
| Traceback (most recent call last): |
| ... |
| SyntaxError: 'continue' not properly in loop |
| |
| There is one test for a break that is not in a loop. The compiler |
| uses a single data structure to keep track of try-finally and loops, |
| so we need to be sure that a break is actually inside a loop. If it |
| isn't, there should be a syntax error. |
| |
| >>> try: |
| ... print(1) |
| ... break |
| ... print(2) |
| ... finally: |
| ... print(3) |
| Traceback (most recent call last): |
| ... |
| SyntaxError: 'break' outside loop |
| |
| Misuse of the nonlocal and global statement can lead to a few unique syntax errors. |
| |
| >>> def f(): |
| ... print(x) |
| ... global x |
| Traceback (most recent call last): |
| ... |
| SyntaxError: name 'x' is used prior to global declaration |
| |
| >>> def f(): |
| ... x = 1 |
| ... global x |
| Traceback (most recent call last): |
| ... |
| SyntaxError: name 'x' is assigned to before global declaration |
| |
| >>> def f(x): |
| ... global x |
| Traceback (most recent call last): |
| ... |
| SyntaxError: name 'x' is parameter and global |
| |
| >>> def f(): |
| ... x = 1 |
| ... def g(): |
| ... print(x) |
| ... nonlocal x |
| Traceback (most recent call last): |
| ... |
| SyntaxError: name 'x' is used prior to nonlocal declaration |
| |
| >>> def f(): |
| ... x = 1 |
| ... def g(): |
| ... x = 2 |
| ... nonlocal x |
| Traceback (most recent call last): |
| ... |
| SyntaxError: name 'x' is assigned to before nonlocal declaration |
| |
| >>> def f(x): |
| ... nonlocal x |
| Traceback (most recent call last): |
| ... |
| SyntaxError: name 'x' is parameter and nonlocal |
| |
| >>> def f(): |
| ... global x |
| ... nonlocal x |
| Traceback (most recent call last): |
| ... |
| SyntaxError: name 'x' is nonlocal and global |
| |
| >>> def f(): |
| ... nonlocal x |
| Traceback (most recent call last): |
| ... |
| SyntaxError: no binding for nonlocal 'x' found |
| |
| From SF bug #1705365 |
| >>> nonlocal x |
| Traceback (most recent call last): |
| ... |
| SyntaxError: nonlocal declaration not allowed at module level |
| |
| From https://bugs.python.org/issue25973 |
| >>> class A: |
| ... def f(self): |
| ... nonlocal __x |
| Traceback (most recent call last): |
| ... |
| SyntaxError: no binding for nonlocal '_A__x' found |
| |
| |
| This tests assignment-context; there was a bug in Python 2.5 where compiling |
| a complex 'if' (one with 'elif') would fail to notice an invalid suite, |
| leading to spurious errors. |
| |
| >>> if 1: |
| ... x() = 1 |
| ... elif 1: |
| ... pass |
| Traceback (most recent call last): |
| ... |
| SyntaxError: cannot assign to function call here. Maybe you meant '==' instead of '='? |
| |
| >>> if 1: |
| ... pass |
| ... elif 1: |
| ... x() = 1 |
| Traceback (most recent call last): |
| ... |
| SyntaxError: cannot assign to function call here. Maybe you meant '==' instead of '='? |
| |
| >>> if 1: |
| ... x() = 1 |
| ... elif 1: |
| ... pass |
| ... else: |
| ... pass |
| Traceback (most recent call last): |
| ... |
| SyntaxError: cannot assign to function call here. Maybe you meant '==' instead of '='? |
| |
| >>> if 1: |
| ... pass |
| ... elif 1: |
| ... x() = 1 |
| ... else: |
| ... pass |
| Traceback (most recent call last): |
| ... |
| SyntaxError: cannot assign to function call here. Maybe you meant '==' instead of '='? |
| |
| >>> if 1: |
| ... pass |
| ... elif 1: |
| ... pass |
| ... else: |
| ... x() = 1 |
| Traceback (most recent call last): |
| ... |
| SyntaxError: cannot assign to function call here. Maybe you meant '==' instead of '='? |
| |
| Missing ':' before suites: |
| |
| >>> def f() |
| ... pass |
| Traceback (most recent call last): |
| SyntaxError: expected ':' |
| |
| >>> class A |
| ... pass |
| Traceback (most recent call last): |
| SyntaxError: expected ':' |
| |
| >>> class R&D: |
| ... pass |
| Traceback (most recent call last): |
| SyntaxError: invalid syntax |
| |
| >>> if 1 |
| ... pass |
| ... elif 1: |
| ... pass |
| ... else: |
| ... x() = 1 |
| Traceback (most recent call last): |
| SyntaxError: expected ':' |
| |
| >>> if 1: |
| ... pass |
| ... elif 1 |
| ... pass |
| ... else: |
| ... x() = 1 |
| Traceback (most recent call last): |
| SyntaxError: expected ':' |
| |
| >>> if 1: |
| ... pass |
| ... elif 1: |
| ... pass |
| ... else |
| ... x() = 1 |
| Traceback (most recent call last): |
| SyntaxError: expected ':' |
| |
| >>> for x in range(10) |
| ... pass |
| Traceback (most recent call last): |
| SyntaxError: expected ':' |
| |
| >>> for x in range 10: |
| ... pass |
| Traceback (most recent call last): |
| SyntaxError: invalid syntax |
| |
| >>> while True |
| ... pass |
| Traceback (most recent call last): |
| SyntaxError: expected ':' |
| |
| >>> with blech as something |
| ... pass |
| Traceback (most recent call last): |
| SyntaxError: expected ':' |
| |
| >>> with blech |
| ... pass |
| Traceback (most recent call last): |
| SyntaxError: expected ':' |
| |
| >>> with blech, block as something |
| ... pass |
| Traceback (most recent call last): |
| SyntaxError: expected ':' |
| |
| >>> with blech, block as something, bluch |
| ... pass |
| Traceback (most recent call last): |
| SyntaxError: expected ':' |
| |
| >>> with (blech as something) |
| ... pass |
| Traceback (most recent call last): |
| SyntaxError: expected ':' |
| |
| >>> with (blech) |
| ... pass |
| Traceback (most recent call last): |
| SyntaxError: expected ':' |
| |
| >>> with (blech, block as something) |
| ... pass |
| Traceback (most recent call last): |
| SyntaxError: expected ':' |
| |
| >>> with (blech, block as something, bluch) |
| ... pass |
| Traceback (most recent call last): |
| SyntaxError: expected ':' |
| |
| >>> with block ad something: |
| ... pass |
| Traceback (most recent call last): |
| SyntaxError: invalid syntax |
| |
| >>> try |
| ... pass |
| Traceback (most recent call last): |
| SyntaxError: expected ':' |
| |
| >>> try: |
| ... pass |
| ... except |
| ... pass |
| Traceback (most recent call last): |
| SyntaxError: expected ':' |
| |
| >>> match x |
| ... case list(): |
| ... pass |
| Traceback (most recent call last): |
| SyntaxError: expected ':' |
| |
| >>> match x x: |
| ... case list(): |
| ... pass |
| Traceback (most recent call last): |
| SyntaxError: invalid syntax |
| |
| >>> match x: |
| ... case list() |
| ... pass |
| Traceback (most recent call last): |
| SyntaxError: expected ':' |
| |
| >>> match x: |
| ... case [y] if y > 0 |
| ... pass |
| Traceback (most recent call last): |
| SyntaxError: expected ':' |
| |
| >>> if x = 3: |
| ... pass |
| Traceback (most recent call last): |
| SyntaxError: invalid syntax. Maybe you meant '==' or ':=' instead of '='? |
| |
| >>> while x = 3: |
| ... pass |
| Traceback (most recent call last): |
| SyntaxError: invalid syntax. Maybe you meant '==' or ':=' instead of '='? |
| |
| >>> if x.a = 3: |
| ... pass |
| Traceback (most recent call last): |
| SyntaxError: cannot assign to attribute here. Maybe you meant '==' instead of '='? |
| |
| >>> while x.a = 3: |
| ... pass |
| Traceback (most recent call last): |
| SyntaxError: cannot assign to attribute here. Maybe you meant '==' instead of '='? |
| |
| |
| Missing parens after function definition |
| |
| >>> def f: |
| Traceback (most recent call last): |
| SyntaxError: expected '(' |
| |
| >>> async def f: |
| Traceback (most recent call last): |
| SyntaxError: expected '(' |
| |
| Parenthesized arguments in function definitions |
| |
| >>> def f(x, (y, z), w): |
| ... pass |
| Traceback (most recent call last): |
| SyntaxError: Function parameters cannot be parenthesized |
| |
| >>> def f((x, y, z, w)): |
| ... pass |
| Traceback (most recent call last): |
| SyntaxError: Function parameters cannot be parenthesized |
| |
| >>> def f(x, (y, z, w)): |
| ... pass |
| Traceback (most recent call last): |
| SyntaxError: Function parameters cannot be parenthesized |
| |
| >>> def f((x, y, z), w): |
| ... pass |
| Traceback (most recent call last): |
| SyntaxError: Function parameters cannot be parenthesized |
| |
| >>> lambda x, (y, z), w: None |
| Traceback (most recent call last): |
| SyntaxError: Lambda expression parameters cannot be parenthesized |
| |
| >>> lambda (x, y, z, w): None |
| Traceback (most recent call last): |
| SyntaxError: Lambda expression parameters cannot be parenthesized |
| |
| >>> lambda x, (y, z, w): None |
| Traceback (most recent call last): |
| SyntaxError: Lambda expression parameters cannot be parenthesized |
| |
| >>> lambda (x, y, z), w: None |
| Traceback (most recent call last): |
| SyntaxError: Lambda expression parameters cannot be parenthesized |
| |
| Custom error messages for try blocks that are not followed by except/finally |
| |
| >>> try: |
| ... x = 34 |
| ... |
| Traceback (most recent call last): |
| SyntaxError: expected 'except' or 'finally' block |
| |
| Custom error message for try block mixing except and except* |
| |
| >>> try: |
| ... pass |
| ... except TypeError: |
| ... pass |
| ... except* ValueError: |
| ... pass |
| Traceback (most recent call last): |
| SyntaxError: cannot have both 'except' and 'except*' on the same 'try' |
| |
| >>> try: |
| ... pass |
| ... except* TypeError: |
| ... pass |
| ... except ValueError: |
| ... pass |
| Traceback (most recent call last): |
| SyntaxError: cannot have both 'except' and 'except*' on the same 'try' |
| |
| >>> try: |
| ... pass |
| ... except TypeError: |
| ... pass |
| ... except TypeError: |
| ... pass |
| ... except* ValueError: |
| ... pass |
| Traceback (most recent call last): |
| SyntaxError: cannot have both 'except' and 'except*' on the same 'try' |
| |
| >>> try: |
| ... pass |
| ... except* TypeError: |
| ... pass |
| ... except* TypeError: |
| ... pass |
| ... except ValueError: |
| ... pass |
| Traceback (most recent call last): |
| SyntaxError: cannot have both 'except' and 'except*' on the same 'try' |
| |
| Ensure that early = are not matched by the parser as invalid comparisons |
| >>> f(2, 4, x=34); 1 $ 2 |
| Traceback (most recent call last): |
| SyntaxError: invalid syntax |
| |
| >>> dict(x=34); x $ y |
| Traceback (most recent call last): |
| SyntaxError: invalid syntax |
| |
| >>> dict(x=34, (x for x in range 10), 1); x $ y |
| Traceback (most recent call last): |
| SyntaxError: invalid syntax |
| |
| >>> dict(x=34, x=1, y=2); x $ y |
| Traceback (most recent call last): |
| SyntaxError: invalid syntax |
| |
| Incomplete dictionary literals |
| |
| >>> {1:2, 3:4, 5} |
| Traceback (most recent call last): |
| SyntaxError: ':' expected after dictionary key |
| |
| >>> {1:2, 3:4, 5:} |
| Traceback (most recent call last): |
| SyntaxError: expression expected after dictionary key and ':' |
| |
| >>> {1: *12+1, 23: 1} |
| Traceback (most recent call last): |
| SyntaxError: cannot use a starred expression in a dictionary value |
| |
| >>> {1: *12+1} |
| Traceback (most recent call last): |
| SyntaxError: cannot use a starred expression in a dictionary value |
| |
| >>> {1: 23, 1: *12+1} |
| Traceback (most recent call last): |
| SyntaxError: cannot use a starred expression in a dictionary value |
| |
| >>> {1:} |
| Traceback (most recent call last): |
| SyntaxError: expression expected after dictionary key and ':' |
| |
| # Ensure that the error is not raised for syntax errors that happen after sets |
| |
| >>> {1} $ |
| Traceback (most recent call last): |
| SyntaxError: invalid syntax |
| |
| # Ensure that the error is not raised for invalid expressions |
| |
| >>> {1: 2, 3: foo(,), 4: 5} |
| Traceback (most recent call last): |
| SyntaxError: invalid syntax |
| |
| >>> {1: $, 2: 3} |
| Traceback (most recent call last): |
| SyntaxError: invalid syntax |
| |
| Specialized indentation errors: |
| |
| >>> while condition: |
| ... pass |
| Traceback (most recent call last): |
| IndentationError: expected an indented block after 'while' statement on line 1 |
| |
| >>> for x in range(10): |
| ... pass |
| Traceback (most recent call last): |
| IndentationError: expected an indented block after 'for' statement on line 1 |
| |
| >>> for x in range(10): |
| ... pass |
| ... else: |
| ... pass |
| Traceback (most recent call last): |
| IndentationError: expected an indented block after 'else' statement on line 3 |
| |
| >>> async for x in range(10): |
| ... pass |
| Traceback (most recent call last): |
| IndentationError: expected an indented block after 'for' statement on line 1 |
| |
| >>> async for x in range(10): |
| ... pass |
| ... else: |
| ... pass |
| Traceback (most recent call last): |
| IndentationError: expected an indented block after 'else' statement on line 3 |
| |
| >>> if something: |
| ... pass |
| Traceback (most recent call last): |
| IndentationError: expected an indented block after 'if' statement on line 1 |
| |
| >>> if something: |
| ... pass |
| ... elif something_else: |
| ... pass |
| Traceback (most recent call last): |
| IndentationError: expected an indented block after 'elif' statement on line 3 |
| |
| >>> if something: |
| ... pass |
| ... elif something_else: |
| ... pass |
| ... else: |
| ... pass |
| Traceback (most recent call last): |
| IndentationError: expected an indented block after 'else' statement on line 5 |
| |
| >>> try: |
| ... pass |
| Traceback (most recent call last): |
| IndentationError: expected an indented block after 'try' statement on line 1 |
| |
| >>> try: |
| ... something() |
| ... except: |
| ... pass |
| Traceback (most recent call last): |
| IndentationError: expected an indented block after 'except' statement on line 3 |
| |
| >>> try: |
| ... something() |
| ... except A: |
| ... pass |
| Traceback (most recent call last): |
| IndentationError: expected an indented block after 'except' statement on line 3 |
| |
| >>> try: |
| ... something() |
| ... except* A: |
| ... pass |
| Traceback (most recent call last): |
| IndentationError: expected an indented block after 'except*' statement on line 3 |
| |
| >>> try: |
| ... something() |
| ... except A: |
| ... pass |
| ... finally: |
| ... pass |
| Traceback (most recent call last): |
| IndentationError: expected an indented block after 'finally' statement on line 5 |
| |
| >>> try: |
| ... something() |
| ... except* A: |
| ... pass |
| ... finally: |
| ... pass |
| Traceback (most recent call last): |
| IndentationError: expected an indented block after 'finally' statement on line 5 |
| |
| >>> with A: |
| ... pass |
| Traceback (most recent call last): |
| IndentationError: expected an indented block after 'with' statement on line 1 |
| |
| >>> with A as a, B as b: |
| ... pass |
| Traceback (most recent call last): |
| IndentationError: expected an indented block after 'with' statement on line 1 |
| |
| >>> with (A as a, B as b): |
| ... pass |
| Traceback (most recent call last): |
| IndentationError: expected an indented block after 'with' statement on line 1 |
| |
| >>> async with A: |
| ... pass |
| Traceback (most recent call last): |
| IndentationError: expected an indented block after 'with' statement on line 1 |
| |
| >>> async with A as a, B as b: |
| ... pass |
| Traceback (most recent call last): |
| IndentationError: expected an indented block after 'with' statement on line 1 |
| |
| >>> async with (A as a, B as b): |
| ... pass |
| Traceback (most recent call last): |
| IndentationError: expected an indented block after 'with' statement on line 1 |
| |
| >>> def foo(x, /, y, *, z=2): |
| ... pass |
| Traceback (most recent call last): |
| IndentationError: expected an indented block after function definition on line 1 |
| |
| >>> class Blech(A): |
| ... pass |
| Traceback (most recent call last): |
| IndentationError: expected an indented block after class definition on line 1 |
| |
| >>> match something: |
| ... pass |
| Traceback (most recent call last): |
| IndentationError: expected an indented block after 'match' statement on line 1 |
| |
| >>> match something: |
| ... case []: |
| ... pass |
| Traceback (most recent call last): |
| IndentationError: expected an indented block after 'case' statement on line 2 |
| |
| >>> match something: |
| ... case []: |
| ... ... |
| ... case {}: |
| ... pass |
| Traceback (most recent call last): |
| IndentationError: expected an indented block after 'case' statement on line 4 |
| |
| Make sure that the old "raise X, Y[, Z]" form is gone: |
| >>> raise X, Y |
| Traceback (most recent call last): |
| ... |
| SyntaxError: invalid syntax |
| >>> raise X, Y, Z |
| Traceback (most recent call last): |
| ... |
| SyntaxError: invalid syntax |
| |
| Check that an multiple exception types with missing parentheses |
| raise a custom exception |
| |
| >>> try: |
| ... pass |
| ... except A, B: |
| ... pass |
| Traceback (most recent call last): |
| SyntaxError: multiple exception types must be parenthesized |
| |
| >>> try: |
| ... pass |
| ... except A, B, C: |
| ... pass |
| Traceback (most recent call last): |
| SyntaxError: multiple exception types must be parenthesized |
| |
| >>> try: |
| ... pass |
| ... except A, B, C as blech: |
| ... pass |
| Traceback (most recent call last): |
| SyntaxError: multiple exception types must be parenthesized |
| |
| >>> try: |
| ... pass |
| ... except A, B, C as blech: |
| ... pass |
| ... finally: |
| ... pass |
| Traceback (most recent call last): |
| SyntaxError: multiple exception types must be parenthesized |
| |
| |
| >>> try: |
| ... pass |
| ... except* A, B: |
| ... pass |
| Traceback (most recent call last): |
| SyntaxError: multiple exception types must be parenthesized |
| |
| >>> try: |
| ... pass |
| ... except* A, B, C: |
| ... pass |
| Traceback (most recent call last): |
| SyntaxError: multiple exception types must be parenthesized |
| |
| >>> try: |
| ... pass |
| ... except* A, B, C as blech: |
| ... pass |
| Traceback (most recent call last): |
| SyntaxError: multiple exception types must be parenthesized |
| |
| >>> try: |
| ... pass |
| ... except* A, B, C as blech: |
| ... pass |
| ... finally: |
| ... pass |
| Traceback (most recent call last): |
| SyntaxError: multiple exception types must be parenthesized |
| |
| Custom exception for 'except*' without an exception type |
| |
| >>> try: |
| ... pass |
| ... except* A as a: |
| ... pass |
| ... except*: |
| ... pass |
| Traceback (most recent call last): |
| SyntaxError: expected one or more exception types |
| |
| |
| >>> f(a=23, a=234) |
| Traceback (most recent call last): |
| ... |
| SyntaxError: keyword argument repeated: a |
| |
| >>> {1, 2, 3} = 42 |
| Traceback (most recent call last): |
| SyntaxError: cannot assign to set display here. Maybe you meant '==' instead of '='? |
| |
| >>> {1: 2, 3: 4} = 42 |
| Traceback (most recent call last): |
| SyntaxError: cannot assign to dict literal here. Maybe you meant '==' instead of '='? |
| |
| >>> f'{x}' = 42 |
| Traceback (most recent call last): |
| SyntaxError: cannot assign to f-string expression here. Maybe you meant '==' instead of '='? |
| |
| >>> f'{x}-{y}' = 42 |
| Traceback (most recent call last): |
| SyntaxError: cannot assign to f-string expression here. Maybe you meant '==' instead of '='? |
| |
| >>> (x, y, z=3, d, e) |
| Traceback (most recent call last): |
| SyntaxError: invalid syntax. Maybe you meant '==' or ':=' instead of '='? |
| |
| >>> [x, y, z=3, d, e] |
| Traceback (most recent call last): |
| SyntaxError: invalid syntax. Maybe you meant '==' or ':=' instead of '='? |
| |
| >>> [z=3] |
| Traceback (most recent call last): |
| SyntaxError: invalid syntax. Maybe you meant '==' or ':=' instead of '='? |
| |
| >>> {x, y, z=3, d, e} |
| Traceback (most recent call last): |
| SyntaxError: invalid syntax. Maybe you meant '==' or ':=' instead of '='? |
| |
| >>> {z=3} |
| Traceback (most recent call last): |
| SyntaxError: invalid syntax. Maybe you meant '==' or ':=' instead of '='? |
| |
| >>> from t import x, |
| Traceback (most recent call last): |
| SyntaxError: trailing comma not allowed without surrounding parentheses |
| |
| >>> from t import x,y, |
| Traceback (most recent call last): |
| SyntaxError: trailing comma not allowed without surrounding parentheses |
| |
| # Check that we dont raise the "trailing comma" error if there is more |
| # input to the left of the valid part that we parsed. |
| |
| >>> from t import x,y, and 3 |
| Traceback (most recent call last): |
| SyntaxError: invalid syntax |
| |
| >>> (): int |
| Traceback (most recent call last): |
| SyntaxError: only single target (not tuple) can be annotated |
| >>> []: int |
| Traceback (most recent call last): |
| SyntaxError: only single target (not list) can be annotated |
| >>> (()): int |
| Traceback (most recent call last): |
| SyntaxError: only single target (not tuple) can be annotated |
| >>> ([]): int |
| Traceback (most recent call last): |
| SyntaxError: only single target (not list) can be annotated |
| |
| Corner-cases that used to fail to raise the correct error: |
| |
| >>> def f(*, x=lambda __debug__:0): pass |
| Traceback (most recent call last): |
| SyntaxError: cannot assign to __debug__ |
| |
| >>> def f(*args:(lambda __debug__:0)): pass |
| Traceback (most recent call last): |
| SyntaxError: cannot assign to __debug__ |
| |
| >>> def f(**kwargs:(lambda __debug__:0)): pass |
| Traceback (most recent call last): |
| SyntaxError: cannot assign to __debug__ |
| |
| >>> with (lambda *:0): pass |
| Traceback (most recent call last): |
| SyntaxError: named arguments must follow bare * |
| |
| Corner-cases that used to crash: |
| |
| >>> def f(**__debug__): pass |
| Traceback (most recent call last): |
| SyntaxError: cannot assign to __debug__ |
| |
| >>> def f(*xx, __debug__): pass |
| Traceback (most recent call last): |
| SyntaxError: cannot assign to __debug__ |
| |
| >>> import ä £ |
| Traceback (most recent call last): |
| SyntaxError: invalid character '£' (U+00A3) |
| |
| Invalid pattern matching constructs: |
| |
| >>> match ...: |
| ... case 42 as _: |
| ... ... |
| Traceback (most recent call last): |
| SyntaxError: cannot use '_' as a target |
| |
| >>> match ...: |
| ... case 42 as 1+2+4: |
| ... ... |
| Traceback (most recent call last): |
| SyntaxError: invalid pattern target |
| |
| >>> match ...: |
| ... case Foo(z=1, y=2, x): |
| ... ... |
| Traceback (most recent call last): |
| SyntaxError: positional patterns follow keyword patterns |
| |
| >>> match ...: |
| ... case Foo(a, z=1, y=2, x): |
| ... ... |
| Traceback (most recent call last): |
| SyntaxError: positional patterns follow keyword patterns |
| |
| >>> match ...: |
| ... case Foo(z=1, x, y=2): |
| ... ... |
| Traceback (most recent call last): |
| SyntaxError: positional patterns follow keyword patterns |
| |
| >>> match ...: |
| ... case C(a=b, c, d=e, f, g=h, i, j=k, ...): |
| ... ... |
| Traceback (most recent call last): |
| SyntaxError: positional patterns follow keyword patterns |
| |
| Uses of the star operator which should fail: |
| |
| A[:*b] |
| |
| >>> A[:*b] |
| Traceback (most recent call last): |
| ... |
| SyntaxError: invalid syntax |
| >>> A[:(*b)] |
| Traceback (most recent call last): |
| ... |
| SyntaxError: cannot use starred expression here |
| >>> A[:*b] = 1 |
| Traceback (most recent call last): |
| ... |
| SyntaxError: invalid syntax |
| >>> del A[:*b] |
| Traceback (most recent call last): |
| ... |
| SyntaxError: invalid syntax |
| |
| A[*b:] |
| |
| >>> A[*b:] |
| Traceback (most recent call last): |
| ... |
| SyntaxError: invalid syntax |
| >>> A[(*b):] |
| Traceback (most recent call last): |
| ... |
| SyntaxError: cannot use starred expression here |
| >>> A[*b:] = 1 |
| Traceback (most recent call last): |
| ... |
| SyntaxError: invalid syntax |
| >>> del A[*b:] |
| Traceback (most recent call last): |
| ... |
| SyntaxError: invalid syntax |
| |
| A[*b:*b] |
| |
| >>> A[*b:*b] |
| Traceback (most recent call last): |
| ... |
| SyntaxError: invalid syntax |
| >>> A[(*b:*b)] |
| Traceback (most recent call last): |
| ... |
| SyntaxError: invalid syntax |
| >>> A[*b:*b] = 1 |
| Traceback (most recent call last): |
| ... |
| SyntaxError: invalid syntax |
| >>> del A[*b:*b] |
| Traceback (most recent call last): |
| ... |
| SyntaxError: invalid syntax |
| |
| A[*(1:2)] |
| |
| >>> A[*(1:2)] |
| Traceback (most recent call last): |
| ... |
| SyntaxError: invalid syntax |
| >>> A[*(1:2)] = 1 |
| Traceback (most recent call last): |
| ... |
| SyntaxError: invalid syntax |
| >>> del A[*(1:2)] |
| Traceback (most recent call last): |
| ... |
| SyntaxError: invalid syntax |
| |
| A[*:] and A[:*] |
| |
| >>> A[*:] |
| Traceback (most recent call last): |
| ... |
| SyntaxError: invalid syntax |
| >>> A[:*] |
| Traceback (most recent call last): |
| ... |
| SyntaxError: invalid syntax |
| |
| A[*] |
| |
| >>> A[*] |
| Traceback (most recent call last): |
| ... |
| SyntaxError: invalid syntax |
| |
| A[**] |
| |
| >>> A[**] |
| Traceback (most recent call last): |
| ... |
| SyntaxError: invalid syntax |
| |
| A[**b] |
| |
| >>> A[**b] |
| Traceback (most recent call last): |
| ... |
| SyntaxError: invalid syntax |
| >>> A[**b] = 1 |
| Traceback (most recent call last): |
| ... |
| SyntaxError: invalid syntax |
| >>> del A[**b] |
| Traceback (most recent call last): |
| ... |
| SyntaxError: invalid syntax |
| |
| def f(x: *b) |
| |
| >>> def f6(x: *b): pass |
| Traceback (most recent call last): |
| ... |
| SyntaxError: invalid syntax |
| >>> def f7(x: *b = 1): pass |
| Traceback (most recent call last): |
| ... |
| SyntaxError: invalid syntax |
| |
| **kwargs: *a |
| |
| >>> def f8(**kwargs: *a): pass |
| Traceback (most recent call last): |
| ... |
| SyntaxError: invalid syntax |
| |
| x: *b |
| |
| >>> x: *b |
| Traceback (most recent call last): |
| ... |
| SyntaxError: invalid syntax |
| >>> x: *b = 1 |
| Traceback (most recent call last): |
| ... |
| SyntaxError: invalid syntax |
| |
| Invalid bytes literals: |
| |
| >>> b"Ä€" |
| Traceback (most recent call last): |
| ... |
| b"Ä€" |
| ^^^ |
| SyntaxError: bytes can only contain ASCII literal characters |
| |
| >>> b"абвгде" |
| Traceback (most recent call last): |
| ... |
| b"абвгде" |
| ^^^^^^^^ |
| SyntaxError: bytes can only contain ASCII literal characters |
| |
| >>> b"abc ъющый" # first 3 letters are ascii |
| Traceback (most recent call last): |
| ... |
| b"abc ъющый" |
| ^^^^^^^^^^^ |
| SyntaxError: bytes can only contain ASCII literal characters |
| |
| """ |
| |
| import re |
| import doctest |
| import unittest |
| |
| from test import support |
| |
| class SyntaxTestCase(unittest.TestCase): |
| |
| def _check_error(self, code, errtext, |
| filename="<testcase>", mode="exec", subclass=None, |
| lineno=None, offset=None, end_lineno=None, end_offset=None): |
| """Check that compiling code raises SyntaxError with errtext. |
| |
| errtest is a regular expression that must be present in the |
| test of the exception raised. If subclass is specified it |
| is the expected subclass of SyntaxError (e.g. IndentationError). |
| """ |
| try: |
| compile(code, filename, mode) |
| except SyntaxError as err: |
| if subclass and not isinstance(err, subclass): |
| self.fail("SyntaxError is not a %s" % subclass.__name__) |
| mo = re.search(errtext, str(err)) |
| if mo is None: |
| self.fail("SyntaxError did not contain %r" % (errtext,)) |
| self.assertEqual(err.filename, filename) |
| if lineno is not None: |
| self.assertEqual(err.lineno, lineno) |
| if offset is not None: |
| self.assertEqual(err.offset, offset) |
| if end_lineno is not None: |
| self.assertEqual(err.end_lineno, end_lineno) |
| if end_offset is not None: |
| self.assertEqual(err.end_offset, end_offset) |
| |
| else: |
| self.fail("compile() did not raise SyntaxError") |
| |
| def test_expression_with_assignment(self): |
| self._check_error( |
| "print(end1 + end2 = ' ')", |
| 'expression cannot contain assignment, perhaps you meant "=="?', |
| offset=7 |
| ) |
| |
| def test_curly_brace_after_primary_raises_immediately(self): |
| self._check_error("f{}", "invalid syntax", mode="single") |
| |
| def test_assign_call(self): |
| self._check_error("f() = 1", "assign") |
| |
| def test_assign_del(self): |
| self._check_error("del (,)", "invalid syntax") |
| self._check_error("del 1", "cannot delete literal") |
| self._check_error("del (1, 2)", "cannot delete literal") |
| self._check_error("del None", "cannot delete None") |
| self._check_error("del *x", "cannot delete starred") |
| self._check_error("del (*x)", "cannot use starred expression") |
| self._check_error("del (*x,)", "cannot delete starred") |
| self._check_error("del [*x,]", "cannot delete starred") |
| self._check_error("del f()", "cannot delete function call") |
| self._check_error("del f(a, b)", "cannot delete function call") |
| self._check_error("del o.f()", "cannot delete function call") |
| self._check_error("del a[0]()", "cannot delete function call") |
| self._check_error("del x, f()", "cannot delete function call") |
| self._check_error("del f(), x", "cannot delete function call") |
| self._check_error("del [a, b, ((c), (d,), e.f())]", "cannot delete function call") |
| self._check_error("del (a if True else b)", "cannot delete conditional") |
| self._check_error("del +a", "cannot delete expression") |
| self._check_error("del a, +b", "cannot delete expression") |
| self._check_error("del a + b", "cannot delete expression") |
| self._check_error("del (a + b, c)", "cannot delete expression") |
| self._check_error("del (c[0], a + b)", "cannot delete expression") |
| self._check_error("del a.b.c + 2", "cannot delete expression") |
| self._check_error("del a.b.c[0] + 2", "cannot delete expression") |
| self._check_error("del (a, b, (c, d.e.f + 2))", "cannot delete expression") |
| self._check_error("del [a, b, (c, d.e.f[0] + 2)]", "cannot delete expression") |
| self._check_error("del (a := 5)", "cannot delete named expression") |
| # We don't have a special message for this, but make sure we don't |
| # report "cannot delete name" |
| self._check_error("del a += b", "invalid syntax") |
| |
| def test_global_param_err_first(self): |
| source = """if 1: |
| def error(a): |
| global a # SyntaxError |
| def error2(): |
| b = 1 |
| global b # SyntaxError |
| """ |
| self._check_error(source, "parameter and global", lineno=3) |
| |
| def test_nonlocal_param_err_first(self): |
| source = """if 1: |
| def error(a): |
| nonlocal a # SyntaxError |
| def error2(): |
| b = 1 |
| global b # SyntaxError |
| """ |
| self._check_error(source, "parameter and nonlocal", lineno=3) |
| |
| def test_yield_outside_function(self): |
| self._check_error("if 0: yield", "outside function") |
| self._check_error("if 0: yield\nelse: x=1", "outside function") |
| self._check_error("if 1: pass\nelse: yield", "outside function") |
| self._check_error("while 0: yield", "outside function") |
| self._check_error("while 0: yield\nelse: x=1", "outside function") |
| self._check_error("class C:\n if 0: yield", "outside function") |
| self._check_error("class C:\n if 1: pass\n else: yield", |
| "outside function") |
| self._check_error("class C:\n while 0: yield", "outside function") |
| self._check_error("class C:\n while 0: yield\n else: x = 1", |
| "outside function") |
| |
| def test_return_outside_function(self): |
| self._check_error("if 0: return", "outside function") |
| self._check_error("if 0: return\nelse: x=1", "outside function") |
| self._check_error("if 1: pass\nelse: return", "outside function") |
| self._check_error("while 0: return", "outside function") |
| self._check_error("class C:\n if 0: return", "outside function") |
| self._check_error("class C:\n while 0: return", "outside function") |
| self._check_error("class C:\n while 0: return\n else: x=1", |
| "outside function") |
| self._check_error("class C:\n if 0: return\n else: x= 1", |
| "outside function") |
| self._check_error("class C:\n if 1: pass\n else: return", |
| "outside function") |
| |
| def test_break_outside_loop(self): |
| msg = "outside loop" |
| self._check_error("break", msg, lineno=1) |
| self._check_error("if 0: break", msg, lineno=1) |
| self._check_error("if 0: break\nelse: x=1", msg, lineno=1) |
| self._check_error("if 1: pass\nelse: break", msg, lineno=2) |
| self._check_error("class C:\n if 0: break", msg, lineno=2) |
| self._check_error("class C:\n if 1: pass\n else: break", |
| msg, lineno=3) |
| self._check_error("with object() as obj:\n break", |
| msg, lineno=2) |
| |
| def test_continue_outside_loop(self): |
| msg = "not properly in loop" |
| self._check_error("if 0: continue", msg, lineno=1) |
| self._check_error("if 0: continue\nelse: x=1", msg, lineno=1) |
| self._check_error("if 1: pass\nelse: continue", msg, lineno=2) |
| self._check_error("class C:\n if 0: continue", msg, lineno=2) |
| self._check_error("class C:\n if 1: pass\n else: continue", |
| msg, lineno=3) |
| self._check_error("with object() as obj:\n continue", |
| msg, lineno=2) |
| |
| def test_unexpected_indent(self): |
| self._check_error("foo()\n bar()\n", "unexpected indent", |
| subclass=IndentationError) |
| |
| def test_no_indent(self): |
| self._check_error("if 1:\nfoo()", "expected an indented block", |
| subclass=IndentationError) |
| |
| def test_bad_outdent(self): |
| self._check_error("if 1:\n foo()\n bar()", |
| "unindent does not match .* level", |
| subclass=IndentationError) |
| |
| def test_kwargs_last(self): |
| self._check_error("int(base=10, '2')", |
| "positional argument follows keyword argument") |
| |
| def test_kwargs_last2(self): |
| self._check_error("int(**{'base': 10}, '2')", |
| "positional argument follows " |
| "keyword argument unpacking") |
| |
| def test_kwargs_last3(self): |
| self._check_error("int(**{'base': 10}, *['2'])", |
| "iterable argument unpacking follows " |
| "keyword argument unpacking") |
| |
| def test_generator_in_function_call(self): |
| self._check_error("foo(x, y for y in range(3) for z in range(2) if z , p)", |
| "Generator expression must be parenthesized", |
| lineno=1, end_lineno=1, offset=11, end_offset=53) |
| |
| def test_except_then_except_star(self): |
| self._check_error("try: pass\nexcept ValueError: pass\nexcept* TypeError: pass", |
| r"cannot have both 'except' and 'except\*' on the same 'try'", |
| lineno=3, end_lineno=3, offset=1, end_offset=8) |
| |
| def test_except_star_then_except(self): |
| self._check_error("try: pass\nexcept* ValueError: pass\nexcept TypeError: pass", |
| r"cannot have both 'except' and 'except\*' on the same 'try'", |
| lineno=3, end_lineno=3, offset=1, end_offset=7) |
| |
| def test_empty_line_after_linecont(self): |
| # See issue-40847 |
| s = r"""\ |
| pass |
| \ |
| |
| pass |
| """ |
| try: |
| compile(s, '<string>', 'exec') |
| except SyntaxError: |
| self.fail("Empty line after a line continuation character is valid.") |
| |
| # See issue-46091 |
| s1 = r"""\ |
| def fib(n): |
| \ |
| '''Print a Fibonacci series up to n.''' |
| \ |
| a, b = 0, 1 |
| """ |
| s2 = r"""\ |
| def fib(n): |
| '''Print a Fibonacci series up to n.''' |
| a, b = 0, 1 |
| """ |
| try: |
| compile(s1, '<string>', 'exec') |
| compile(s2, '<string>', 'exec') |
| except SyntaxError: |
| self.fail("Indented statement over multiple lines is valid") |
| |
| def test_continuation_bad_indentation(self): |
| # Check that code that breaks indentation across multiple lines raises a syntax error |
| |
| code = r"""\ |
| if x: |
| y = 1 |
| \ |
| foo = 1 |
| """ |
| |
| self.assertRaises(IndentationError, exec, code) |
| |
| @support.cpython_only |
| def test_nested_named_except_blocks(self): |
| code = "" |
| for i in range(12): |
| code += f"{' '*i}try:\n" |
| code += f"{' '*(i+1)}raise Exception\n" |
| code += f"{' '*i}except Exception as e:\n" |
| code += f"{' '*4*12}pass" |
| self._check_error(code, "too many statically nested blocks") |
| |
| def test_barry_as_flufl_with_syntax_errors(self): |
| # The "barry_as_flufl" rule can produce some "bugs-at-a-distance" if |
| # is reading the wrong token in the presence of syntax errors later |
| # in the file. See bpo-42214 for more information. |
| code = """ |
| def func1(): |
| if a != b: |
| raise ValueError |
| |
| def func2(): |
| try |
| return 1 |
| finally: |
| pass |
| """ |
| self._check_error(code, "expected ':'") |
| |
| def test_invalid_line_continuation_error_position(self): |
| self._check_error(r"a = 3 \ 4", |
| "unexpected character after line continuation character", |
| lineno=1, offset=8) |
| self._check_error('1,\\#\n2', |
| "unexpected character after line continuation character", |
| lineno=1, offset=4) |
| self._check_error('\nfgdfgf\n1,\\#\n2\n', |
| "unexpected character after line continuation character", |
| lineno=3, offset=4) |
| |
| def test_invalid_line_continuation_left_recursive(self): |
| # Check bpo-42218: SyntaxErrors following left-recursive rules |
| # (t_primary_raw in this case) need to be tested explicitly |
| self._check_error("A.\u018a\\ ", |
| "unexpected character after line continuation character") |
| self._check_error("A.\u03bc\\\n", |
| "unexpected EOF while parsing") |
| |
| def test_error_parenthesis(self): |
| for paren in "([{": |
| self._check_error(paren + "1 + 2", f"\\{paren}' was never closed") |
| |
| for paren in "([{": |
| self._check_error(f"a = {paren} 1, 2, 3\nb=3", f"\\{paren}' was never closed") |
| |
| for paren in ")]}": |
| self._check_error(paren + "1 + 2", f"unmatched '\\{paren}'") |
| |
| # Some more complex examples: |
| code = """\ |
| func( |
| a=["unclosed], # Need a quote in this comment: " |
| b=2, |
| ) |
| """ |
| self._check_error(code, "parenthesis '\\)' does not match opening parenthesis '\\['") |
| |
| def test_error_string_literal(self): |
| |
| self._check_error("'blech", "unterminated string literal") |
| self._check_error('"blech', "unterminated string literal") |
| self._check_error("'''blech", "unterminated triple-quoted string literal") |
| self._check_error('"""blech', "unterminated triple-quoted string literal") |
| |
| def test_invisible_characters(self): |
| self._check_error('print\x17("Hello")', "invalid non-printable character") |
| |
| def test_match_call_does_not_raise_syntax_error(self): |
| code = """ |
| def match(x): |
| return 1+1 |
| |
| match(34) |
| """ |
| compile(code, "<string>", "exec") |
| |
| def test_case_call_does_not_raise_syntax_error(self): |
| code = """ |
| def case(x): |
| return 1+1 |
| |
| case(34) |
| """ |
| compile(code, "<string>", "exec") |
| |
| def test_multiline_compiler_error_points_to_the_end(self): |
| self._check_error( |
| "call(\na=1,\na=1\n)", |
| "keyword argument repeated", |
| lineno=3 |
| ) |
| |
| @support.cpython_only |
| def test_syntax_error_on_deeply_nested_blocks(self): |
| # This raises a SyntaxError, it used to raise a SystemError. Context |
| # for this change can be found on issue #27514 |
| |
| # In 2.5 there was a missing exception and an assert was triggered in a |
| # debug build. The number of blocks must be greater than CO_MAXBLOCKS. |
| # SF #1565514 |
| |
| source = """ |
| while 1: |
| while 2: |
| while 3: |
| while 4: |
| while 5: |
| while 6: |
| while 8: |
| while 9: |
| while 10: |
| while 11: |
| while 12: |
| while 13: |
| while 14: |
| while 15: |
| while 16: |
| while 17: |
| while 18: |
| while 19: |
| while 20: |
| while 21: |
| while 22: |
| break |
| """ |
| self._check_error(source, "too many statically nested blocks") |
| |
| @support.cpython_only |
| def test_error_on_parser_stack_overflow(self): |
| source = "-" * 100000 + "4" |
| for mode in ["exec", "eval", "single"]: |
| with self.subTest(mode=mode): |
| with self.assertRaises(MemoryError): |
| compile(source, "<string>", mode) |
| |
| @support.cpython_only |
| def test_deep_invalid_rule(self): |
| # Check that a very deep invalid rule in the PEG |
| # parser doesn't have exponential backtracking. |
| source = "d{{{{{{{{{{{{{{{{{{{{{{{{{```{{{{{{{ef f():y" |
| with self.assertRaises(SyntaxError): |
| compile(source, "<string>", "exec") |
| |
| |
| def load_tests(loader, tests, pattern): |
| tests.addTest(doctest.DocTestSuite()) |
| return tests |
| |
| |
| if __name__ == "__main__": |
| unittest.main() |
