forked from huawei/mindspore2022
123 lines
3.5 KiB
Python
123 lines
3.5 KiB
Python
# This is the Python adaptation and derivative work of Myia (https://github.com/mila-iqia/myia/).
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#
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# Copyright 2020 Huawei Technologies Co., Ltd
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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# ============================================================================
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"""Define the namespace of parse."""
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import builtins
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from mindspore import log as logger
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class Namespace:
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"""
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Base class of namespace for resolve variables.
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Args:
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name (str): The namespace's name.
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dicts (dict): A list of dict containing the namespace's variable.
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"""
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def __init__(self, name, *dicts):
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self.name = name
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self.dicts = dicts
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def __contains__(self, name):
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for d in self.dicts:
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if name in d:
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return True
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return False
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def __getitem__(self, name):
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for d in self.dicts:
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if name in d:
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return d[name]
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raise NameError(name)
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def __repr__(self):
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return f'Namespace:{self.name}'
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class CellNamespace(Namespace):
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"""
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Namespace for Cell object.
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Args:
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name (str): Valid module name, it can be imported.
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"""
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def __init__(self, name):
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mod_dict = vars(__import__(name, fromlist=['_']))
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builtins_dict = vars(builtins)
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super().__init__(name, mod_dict, builtins_dict)
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def __getstate__(self):
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return (self.name,)
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def __setstate__(self, state):
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name, = state
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mod_dict = vars(__import__(name, fromlist=['_']))
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builtins_dict = vars(builtins)
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super().__init__(name, mod_dict, builtins_dict)
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class ClosureNamespace(Namespace):
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"""
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Namespace for function closure.
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Args:
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fn (Function): A python function.
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"""
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def __init__(self, fn):
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name = f'{fn.__module__}..<{fn.__name__}>'
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names = fn.__code__.co_freevars
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cells = fn.__closure__
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ns = dict(zip(names, cells or ()))
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super().__init__(name, ns)
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def __getitem__(self, name):
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d, = self.dicts
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try:
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return d[name].cell_contents
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except ValueError:
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raise UnboundLocalError(name)
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class ClassMemberNamespace(Namespace):
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"""
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Namespace of a class's closure.
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Args:
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obj (Object): A python class object.
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"""
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def __init__(self, obj):
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self.__class_member_namespace__ = True
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label = f'{obj.__module__}..<{obj.__class__.__name__}::{id(obj)}>'
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super().__init__(label, obj)
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def __getitem__(self, name):
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d, = self.dicts
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if name == "self":
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return d
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if name == "namespace":
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return self
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try:
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if hasattr(d, name):
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return getattr(d, name)
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return d.__dict__[name]
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except ValueError:
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raise UnboundLocalError(name)
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except KeyError:
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logger.info(f"'{d.__class__.__name__ }' object has no attribute or method: '{name}', so will return None.")
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raise AttributeError(name)
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