| # @package modifier_context |
| # Module caffe2.python.modifier_context |
| |
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| |
| DEFAULT_MODIFIER = 'DEFAULT' |
| |
| |
| class ModifierContext: |
| """ |
| provide context to allow param_info to have different modifiers |
| """ |
| |
| def __init__(self): |
| self._modifiers = {} |
| self._modifiers_list = [] |
| |
| def _rebuild_modifiers(self): |
| self._modifiers = {} |
| for m in self._modifiers_list: |
| self._modifiers.update(m) |
| |
| def _has_modifier(self, name): |
| return name in self._modifiers |
| |
| def _get_modifier(self, name): |
| return self._modifiers.get(name) |
| |
| def push_modifiers(self, modifiers): |
| # modifier override is allowed |
| self._modifiers_list.append(modifiers) |
| self._modifiers.update(modifiers) |
| |
| def pop_modifiers(self): |
| assert len(self._modifiers_list) > 0 |
| self._modifiers_list.pop() |
| self._rebuild_modifiers() |
| |
| |
| class UseModifierBase: |
| ''' |
| context class to allow setting the current context. |
| Example usage with layer: |
| modifiers = {'modifier1': modifier1, 'modifier2': modifier2} |
| with Modifiers(modifiers): |
| modifier = ModifierContext.current().get_modifier('modifier1') |
| layer(modifier=modifier) |
| ''' |
| |
| def __init__(self, modifier_or_dict): |
| if isinstance(modifier_or_dict, dict): |
| self._modifiers = modifier_or_dict |
| else: |
| self._modifiers = {DEFAULT_MODIFIER: modifier_or_dict} |
| |
| def _context_class(self): |
| raise NotImplementedError |
| |
| def __enter__(self): |
| self._context_class().current().push_modifiers(self._modifiers) |
| return self |
| |
| def __exit__(self, type, value, traceback): |
| self._context_class().current().pop_modifiers() |