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# Licensed under the Apache License, Version 2.0 (the "License");
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# http://www.apache.org/licenses/LICENSE-2.0
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"""Rewrite module api: Node."""
from __future__ import absolute_import
from typing import Union, Optional
from mindspore.nn import Cell
from mindspore.ops.primitive import Primitive
from ..._checkparam import Validator
from ..node import Node as NodeImpl
from ..symbol_tree import SymbolTree as SymbolTreeImpl
from .node_type import NodeType
from .scoped_value import ScopedValue
[文档]class Node:
"""
Node is a data structure represents a source code line in network.
For the most part, Node represents an operator invoking in forward which could be an instance of `Cell`, an instance
of `Primitive` or a callable method.
`NodeImpl` mentioned below is implementation of `Node` which is not an interface of Rewrite. Rewrite recommend
invoking specific create method of `Node` to instantiate an instance of Node such as `create_call_cell` rather than
invoking constructor of `Node` directly, so don't care about what is `NodeImpl` and use its instance just as a
handler.
Args:
node (NodeImpl): A handler of `NodeImpl`.
"""
def __init__(self, node: NodeImpl):
self._node = node
def __eq__(self, other: 'Node'):
Validator.check_value_type("other", other, [Node], "Node")
return self._node == other._node
[文档] @staticmethod
def create_call_cell(cell: Cell, targets: [Union[ScopedValue, str]], args: [ScopedValue] = None,
kwargs: {str: ScopedValue}=None, name: str = "", is_sub_net: bool = False) -> 'Node':
"""
Create a node. Only support create from a `Cell` now.
A node is corresponding to source code like:
.. code-block::
`targets` = self.`name`(*`args`, **`kwargs`)
Args:
cell (Cell): Cell-operator of this forward-layer.
targets (list[ScopedValue]): Indicate output names. Used as targets of an assign statement in source code.
Rewrite will check and ensure the uniqueness of each target while node being inserted.
args (list[ScopedValue]): Indicate input names. Used as args of a call expression of an assign statement in
source code. Default is None indicate the `cell` has no args inputs. Rewrite will check and ensure the
uniqueness of each arg while node being inserted.
kwargs (dict): Type of key must be `str` and type of value must be `ScopedValue`.
Indicate keyword input names. Used as kwargs of a call expression of an assign statement in source code.
Default is None indicate the `cell` has no kwargs inputs. Rewrite will check and ensure the uniqueness
of each kwarg while node being inserted.
name (str): Indicate the name of node. Used as field name in source code. Default is None. Rewrite will
generate name from `targets` when name is None. Rewrite will check and ensure the uniqueness of `name`
while node being inserted.
is_sub_net (bool): Indicate that is `cell` a network. If `is_sub_net` is true, Rewrite will try to parse the
`cell` to a TreeNode, else a CallCell Node. Default is a False.
Returns:
An instance of `Node`.
Raises:
TypeError: If `cell` is not a `Cell`.
TypeError: If `targets` is not `list`.
TypeError: If the type of `targets` is not in `[ScopedValue, str]`.
TypeError: If arg in `args` is not a `ScopedValue`.
TypeError: If key of `kwarg` is not a str or value of kwarg in `kwargs` is not a `ScopedValue`.
"""
Validator.check_value_type("cell", cell, [Cell, Primitive], "Node")
Validator.check_element_type_of_iterable("targets", targets, [ScopedValue, str], "Node")
Validator.check_value_type("name", name, [str], "Node")
Validator.check_value_type("is_sub_net", is_sub_net, [bool], "Node")
if args is not None:
Validator.check_element_type_of_iterable("args", args, [ScopedValue], "Node")
if kwargs is not None:
Validator.check_element_type_of_dict("kwargs", kwargs, [str], [ScopedValue], "Node")
return Node(NodeImpl.create_call_op(cell, None, targets, ScopedValue.create_naming_value(name, "self"),
args, kwargs, name, is_sub_net))
[文档] def get_handler(self) -> NodeImpl:
"""
Get handler of node implementation.
Returns:
An instance of `NodeImpl`.
"""
return self._node
[文档] def get_prev(self) -> 'Node':
"""
Get previous node of current node in source code order.
Returns:
An instance of `Node` as previous node.
"""
return Node(self._node.get_prev())
[文档] def get_next(self) -> 'Node':
"""
Get next node of current node in source code order.
Returns:
An instance of `Node` as next node.
"""
return Node(self._node.get_next())
[文档] def get_users(self) -> ['Node']:
"""
Get output nodes of current node in topological order.
Returns:
A list of nodes represents users.
"""
belong_symbol_tree: SymbolTreeImpl = self._node.get_belong_symbol_tree()
if belong_symbol_tree is None:
return []
unique_results = []
for node_user in belong_symbol_tree.get_node_users(self._node):
node = node_user[0]
if node not in unique_results:
unique_results.append(node)
return [Node(node_impl) for node_impl in unique_results]
[文档] def set_arg(self, index: int, arg: Union[ScopedValue, str]):
"""
Set argument of current node.
Args:
index (int): Indicate which input being modified.
arg (Union[ScopedValue, str]): New argument to been set.
Raises:
TypeError: If `index` is not a `int` number.
TypeError: If the type of `arg` is not in [`ScopedValue`, `str`].
"""
Validator.check_value_type("index", index, [int], "Node")
Validator.check_value_type("arg", arg, [ScopedValue, str], "Node")
belong_symbol_tree: SymbolTreeImpl = self._node.get_belong_symbol_tree()
if belong_symbol_tree is None:
self._node.set_arg(arg, index)
else:
belong_symbol_tree.set_node_arg(self._node, index, arg)
[文档] def set_arg_by_node(self, arg_idx: int, src_node: 'Node', out_idx: Optional[int] = None):
"""
Set argument of current node by another `Node`.
Args:
arg_idx (int): Indicate which input being modified.
src_node (Node): A `Node` as new input. Can be a node or name of node.
out_idx (int, optional): Indicate which output of `src_node` as new input of current node. Default is None
which means use first output of `src_node` as new input.
Raises:
RuntimeError: If `src_node` is not belong to current `SymbolTree`.
RuntimeError: If current node and `src_node` is not belong to same `SymbolTree`.
TypeError: If `arg_idx` is not a `int` number.
ValueError: If `arg_idx` is out of range.
TypeError: If `src_node` is not a `Node` instance.
TypeError: If `out_idx` is not a `int` number.
ValueError: If `out_idx` is out of range.
ValueError: If `src_node` has multi-outputs while `out_idx` is None or `out_idx` is not offered.
"""
Validator.check_value_type("arg_idx", arg_idx, [int], "Node")
Validator.check_value_type("src_node", src_node, [Node], "Node")
if out_idx is not None:
Validator.check_value_type("out_idx", out_idx, [int], "Node")
belong_symbol_tree: SymbolTreeImpl = self._node.get_belong_symbol_tree()
if belong_symbol_tree is None:
self._node.set_arg_by_node(arg_idx, src_node._node, out_idx)
else:
belong_symbol_tree.set_node_arg_by_node(self._node, arg_idx, src_node._node, out_idx)
[文档] def get_targets(self) -> [ScopedValue]:
"""
Get targets of current node.
- When node_type of current node is `CallCell`, `CallPrimitive`, `CallMethod` or `Tree`, `targets` are strings
represents invoke result of the cell-op or primitive-op or function-call which are corresponding to targets of
ast.Assign.
- When node_type of current node is Input, `targets` should have only one element which is a string represents
parameter of function.
- When node_type of current node is `Python` or `Output`, `targets` are don't-care.
Returns:
A list of instances of ScopedValue as targets of node.
"""
return self._node.get_targets()
[文档] def get_name(self) -> str:
"""
Get the name of current node.
When node has been inserted into `SymbolTree`, the name of node should be unique in `SymbolTree`.
Returns:
A string as name of node.
"""
return self._node.get_name()
[文档] def get_node_type(self) -> NodeType:
"""
Get the node_type of current node.
Returns:
A NodeType as node_type of node.
"""
return self._node.get_node_type()
[文档] def get_instance_type(self) -> type:
"""
Get the instance_type of current node.
- When node_type of current node is `CallCell`, instance_type is type of cell-op.
- When node_type of current node is `CallPrimitive`, instance_type is type of primitive-op.
- When node_type of current node is `Tree`, instance_type is type of network-cell.
- When node_type of current node is `Python`, `Input`, `Output` or `CallMethod`, instance_type should be
NoneType.
Returns:
A type object represents corresponding instance type of current node.
"""
return self._node.get_instance_type()
[文档] def get_instance(self):
"""
Get the instance of current node.
- When node_type of current node is `CallCell`, instance is an instance of Cell.
- When node_type of current node is `CallPrimitive`, instance is an instance of primitive.
- When node_type of current node is `Tree`, instance is an instance of network-cell.
- When node_type of current node is `Python`, `Input`, `Output` or `CallMethod`, instance should be None.
Returns:
A object represents corresponding instance of current node.
"""
return self._node.get_instance()
[文档] def get_args(self) -> [ScopedValue]:
"""
Get the arguments of current node.
- When node_type of current node is `CallCell`, `CallPrimitive` or `Tree`, arguments are corresponding to args
of ast.Call which represents arguments to invoke forward method of cell-op or primitive-op.
- When node_type of current node is `Input`, arguments represents default-value of argument of function.
- When node_type of current node is `Output`, arguments represents return values.
- When node_type of current node is `Python`, arguments are don't-care.
Returns:
A list of instances of `ScopedValue`.
"""
return self._node.get_args()
[文档] def get_kwargs(self) -> {str: ScopedValue}:
"""
Get the keyword arguments of current node.
- When node_type of current node is `CallCell`, `CallPrimitive` or `Tree`, keyword arguments are corresponding
to kwargs of ast.Call which represents arguments to invoke forward method of cell-op or primitive-op.
- When node_type of current node is `Python`, `Input` or `Output`, keyword arguments are don't-care.
Returns:
A dict of str to instance of `ScopedValue`.
"""
return self._node.get_kwargs()
[文档] def set_attribute(self, key: str, value):
"""
Set attribute of current node.
Args:
key (str): Key of attribute.
value (object): Value of attribute.
Raises:
TypeError: If `key` is not a `str`.
"""
Validator.check_value_type("key", key, [str], "Node attribute")
self._node.set_attribute(key, value)
[文档] def get_attributes(self) -> {str: object}:
"""
Get all attributes of current node.
Returns:
A dict of str to instance of object as attributes.
"""
return self._node.get_attributes()
[文档] def get_attribute(self, key: str):
"""
Get attribute of current node by key.
Args:
key (str): Key of attribute.
Returns:
A object as attribute.
Raises:
TypeError: If `key` is not a `str`.
"""
Validator.check_value_type("key", key, [str], "Node attribute")
return self._node.get_attribute(key)