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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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"""Patterns for describing graphs"""
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#描述图形的模式
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from mindspore.ops import Primitive
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from mindspore.common.tensor import Tensor
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from mindspore._c_expression import Pattern, OneOf_, Prim_, Call_, NoneOf_, Any, NewTensor_, NewParameter_, Imm
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__all__ = [
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"OneOf",
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"Prim",
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"Call",
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"NoneOf",
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"Any",
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"NewTensor",
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"NewParameter",
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"Imm"
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]
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class OneOf(OneOf_):
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r"""
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Express a pattern which allows a list of patterns.
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表达一个允许模式列表的模式
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"""
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def __init__(self, patterns=None):
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r"""
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Args:
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patterns(Union[:class:`mindspore.graph_utils.graph_pattern`,
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tuple[:class:`mindspore.graph_utils.graph_pattern`],
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list[:class:`mindspore.graph_utils.graph_pattern`]]): list of allowed patterns,
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each element should be one of the exposed Pattern instance.
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Raises:
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TypeError: raise type error for invalid inputs.
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"""
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self.patterns = patterns
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if isinstance(patterns, Pattern):
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OneOf_.__init__(self, [patterns])
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#如果patterns是mindspore.graph_utils.graph_pattern类的实例，则使用包含patterns的单一元素列表初始化基类OneOf_。
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elif isinstance(patterns, (tuple, list)) and all(isinstance(pattern, Pattern) for pattern in patterns):
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OneOf_.__init__(self, patterns)
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#如果patterns是元组或列表，并且其中的所有元素都是mindspore.graph_utils.graph_pattern类的实例，
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#则使用包含patterns中模式的列表初始化基类OneOf_
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else:
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raise TypeError(f"Expect patterns to be a list of Patterns/Pattern, got : {patterns}")
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#如果patterns是其他类型的对象，或者其中包含不是mindspore.graph_utils.graph_pattern类的实例，
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#则抛出TypeError并附带相应的错误消息。
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class Prim(Prim_):
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r"""
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Express a pattern of certain primitive type(s).
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表示某种基本类型的模式
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NOTE:
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This pattern will match and only match the primitive value node. If matching primitive CNode is needed,
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please refer to CallWith pattern.
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"""
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def __init__(self, types, name=None):
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r"""
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Args:
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支持三种不同的types参数输入方式：
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types (Union[str, :class:`mindspore.ops.Primitive`, list[:class:`mindspore.ops.Primitive`],
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tuple[:class:`mindspore.ops.Primitive`]):
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Specify allowed types.
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If it is a string, the form could be
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1) a single primitive type, e.g. 'Conv2D'若types是一个字符串，则可以是单个基本类型，例如 'Conv2D'
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2) a set of primitive types separated by '|', e.g. 'MatMul|Conv2D'
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多个基本类型，用|符号分隔，例如 'MatMul|Conv2D'
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It can also be a Primitive or a list/tuple of Primitives, e.g. [ops.Conv2D(1, 6)]
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如果types是一个Primitive对象，则表示仅匹配该具体的基本类型。
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如果types是一个列表或元组，并且列表中的元素都是Primitive对象，则表示匹配多个基本类型。
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name (str): name of the pattern, optional. Default: None.
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Raises:
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TypeError: raise type error for invalid argument.
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"""
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# 如果提供了 name 参数，但不是字符串类型，则抛出 TypeError
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if name is not None and not isinstance(name, str):
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raise TypeError(f"Expect string, got : {name}")
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# 将参数 name 赋值给对象的 name 属性
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self.name = name
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# 根据 types 参数的类型进行不同的处理
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if isinstance(types, str):
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if self.name is None:
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self.name = types
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self.types = types.split('|')
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# 如果 types 是一个字符串，则将其按照 '|' 符号拆分，并存储在 self.types 中
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elif isinstance(types, Primitive):
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# 如果 types 是一个 Primitive 对象，则表示只允许匹配这个具体的基本类型
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if self.name is None:
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self.name = types.name
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self.types = [types]
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elif isinstance(types, (tuple, list)) and all(isinstance(tp, Primitive) for tp in types):
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# 如果 types 是一个包含 Primitive 对象的列表或元组，则表示允许匹配多个基本类型
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if self.name is None:
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self.name = ""
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for prim in types:
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self.name += prim.name
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self.types = types
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else:
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# 如果 types 参数不是允许的类型，则抛出 TypeError
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raise TypeError(f"Expecting a primitive type string or a list of Primitives, got : {types}")
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# 调用父类 Prim_ 的初始化方法，将处理好的 types 和 name 作为参数传递给父类
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Prim_.__init__(self, self.types, self.name)
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class Call(Call_):
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#初始化对象的属性
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r"""
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Express a primitive CNode.
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"""
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def __init__(self, prim_pattern, inputs=None):
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r"""
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Args:
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prim_pattern (Union[str, :class:`mindspore.graph_utils.graph_pattern.IsPrimTypeOf`,
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:class:`mindspore.ops.Primitive`]): Primitive ValueNode in the Primitive CNode.
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inputs (Union[list[:class:`mindspore.graph_utils.graph_pattern`],
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tuple[:class:`mindspore.graph_utils.graph_pattern`]]):
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Specify inputs pattern for the primitive(s), optional. If None, accepts any inputs; if specified, input
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patterns should be of right order and each element should be one of the exposed Pattern instance.
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模式的顺序应该正确，每个元素应该是公开的Pattern实例之一
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Raises:
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TypeError: raise type error for invalid argument.
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"""
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#检查prim_pattern的类型是否是Pattern、Primitive或字符串类型。
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#如果不是这些类型之一，则抛出TypeError，表示期望prim_pattern是Pattern、Primitive或字符串类型。
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if not isinstance(prim_pattern, (Pattern, str, Primitive)):
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raise TypeError(f"Expect prim_pattern to be Pattern, Primitive or string, got : {prim_pattern}")
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#将传入的prim_pattern赋值给实例变量self.prim_pattern，以保存原语模式（Primitive Pattern）或原语名称（Primitive name）
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self.prim_pattern = prim_pattern
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#将self.inputs初始化为空列表
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self.inputs = []
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#None：什么都不做
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if inputs is None:
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pass
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#检查inputs是否为Pattern的列表或元组，且其中的所有元素都是Pattern类型。
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elif isinstance(inputs, (tuple, list)) and all(isinstance(input, Pattern) for input in inputs):
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self.inputs = inputs
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#如果inputs不满足上述条件，抛出TypeError，表示期望inputs是Pattern的列表。
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else:
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raise TypeError(f"Expect inputs to be a list of Patterns, got : {inputs}")
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Call_.__init__(self, self.prim_pattern, self.inputs)
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#调用基类Call_的构造函数来完成初始化，传入self.prim_pattern作为原语模式或名称，
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#以及self.inputs作为输入模式列表。
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class NoneOf(NoneOf_):
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r"""
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Express a pattern which forbids a list of patterns.
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表达一个禁止模式列表的模式。
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NOTE:
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NoneOf pattern should not be the root pattern.
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#NoneOf模式不是根模式
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"""
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def __init__(self, patterns=None):
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r"""
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Args:
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patterns(Union[list[:class:`mindspore.graph_utils.graph_pattern`]]: list of forbidden patterns, each
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element should be one of the exposed Pattern instance.
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禁用模式列表，每个元素应该是公开的Pattern实例之一。
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Raises:
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TypeError: raise type error for invalid argument.
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"""
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self.patterns = patterns
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if patterns is None:
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NoneOf_.__init__(self, ())
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#如果 patterns 参数为 None，即未提供 patterns，则将 None 传递给 NoneOf_ 类的初始化方法。
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elif isinstance(patterns, Pattern):
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NoneOf_.__init__(self, [patterns])
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#如果 patterns 参数是一个单独的 Pattern 对象，则将包含这个 Pattern 对象的列表传递给 NoneOf_ 类的初始化方法。
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elif isinstance(patterns, (tuple, list)) and all(isinstance(pattern, Pattern) for pattern in patterns):
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NoneOf_.__init__(self, patterns)
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#如果 patterns 参数是一个列表或元组，并且列表中的元素都是 Pattern 对象，
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#则将整个列表传递给 NoneOf_ 类的初始化方法。
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else:
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raise TypeError(f"Expect list of Patterns/Pattern, got : {patterns}")
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class NewTensor(NewTensor_):
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r"""
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New Tensor to be used in the target.
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要在目标中使用的新张量
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"""
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def __init__(self, input_tensor):
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r"""
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Args:
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input_tensor(:class:`mindspore.common.tensor.Tensor`): new tensor to be used in the target.
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要在目标中使用的新张量
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Raises:
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TypeError: raise type error for invalid argument.
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"""
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self.input_tensor = input_tensor
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# 将传入的 input_tensor 参数赋值给对象的 input_tensor 属性
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if isinstance(input_tensor, Tensor):
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# 检查 input_tensor 参数的类型
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NewTensor_.__init__(self, input_tensor)
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# 如果 input_tensor 是一个 Tensor 对象，则调用 NewTensor_ 类的初始化方法，并传入 input_tensor 作为参数
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else:
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raise TypeError(f"Expect input_tensor to be a Tensor， got : {input_tensor}")
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# 如果 input_tensor 参数不是 Tensor 对象，则抛出 TypeError，指示输入参数类型错误
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class NewParameter(NewParameter_):
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r"""
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New Parameter to be used in the target.
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"""
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def __init__(self, para_name, default_tensor, requires_grad=False, layerwise_parallel=False):
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r"""
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Args:
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para_name(str): name for the new Parameter.
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default_tensor(:class:`mindspore.common.tensor.Tensor`): default value for the new Parameter.
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requires_grad(bool): True if the parameter requires gradient. Default: True.
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如果参数需要梯度，则为True
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layerwise_parallel(bool): switch for layerwise parallel mode. Default: False.
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Layerwise_parallel (bool):分层并行模式开关。
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Raises:
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TypeError: raise type error for invalid argument.
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"""
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# 将传入的 para_name、default_tensor、requires_grad 和 layerwise_parallel 参数赋值给对象的相应属性
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self.para_name = para_name
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self.default_tensor = default_tensor
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self.requires_grad = requires_grad
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self.layerwise_parallel = layerwise_parallel
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# 检查传入的参数类型是否正确，并根据结果选择初始化父类 NewParameter_
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if isinstance(para_name, str) and isinstance(default_tensor, Tensor) and isinstance(requires_grad, bool) and\
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isinstance(layerwise_parallel, bool):
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# 如果 para_name 是一个字符串，default_tensor 是一个 Tensor 对象，requires_grad 和 layerwise_parallel 都是布尔值，
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# 则调用 NewParameter_ 类的初始化方法，并传入 para_name、default_tensor、requires_grad 和 layerwise_parallel 作为参数。
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NewParameter_.__init__(self, self.para_name, self.default_tensor, self.requires_grad,
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self.layerwise_parallel)
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else:
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# 如果有任何一个参数类型不正确，则抛出 TypeError，指示输入参数类型错误。
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raise TypeError(f"Expect para_name(str), default_tensor(Tensor), requires_grad(bool), \
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layerwise_parallel(bool)， got : {para_name}, {default_tensor}, \
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{requires_grad}, {layerwise_parallel}")
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