astroid.nodes.NamedExpr

class documentation

class NamedExpr(mixins.AssignTypeMixin, NodeNG): (source)

Represents the assignment from the assignment expression

>>> import astroid
>>> module = astroid.parse('if a := 1: pass')
>>> module.body[0].test
<NamedExpr l.1 at 0x7f23b2e4ed30>

Method	`__init__`
Method	`frame`	The first parent frame node.
Method	`postinit`	Undocumented
Method	`scope`	The first parent node defining a new scope. These can be Module, FunctionDef, ClassDef, Lambda, or GeneratorExp nodes.
Method	`set_local`	Define that the given name is declared in the given statement node. NamedExpr's in Arguments, Keyword or Comprehension are evaluated in their parent's parent scope. So we add to their frame's locals.
Class Variable	`assigned_stmts`	Returns the assigned statement (non inferred) according to the assignment type. See astroid/protocols.py for actual implementation.
Class Variable	`optional_assign`	Whether this node optionally assigns a variable.
Instance Variable	`target`	The assignment target
Instance Variable	`value`	The value that gets assigned in the expression
Class Variable	`_astroid_fields`	Node attributes that contain child nodes.

Inherited from AssignTypeMixin:

Method	`assign_type`	Undocumented
Method	`_get_filtered_stmts`	method used in filter_stmts

Inherited from NodeNG:

Method	`__repr__`	Undocumented
Method	`__str__`	Undocumented
Method	`accept`	Visit this node using the given visitor.
Method	`as_string`	Get the source code that this node represents.
Method	`block_range`	Get a range from the given line number to where this node ends.
Method	`bool_value`	Determine the boolean value of this node.
Method	`callable`	Whether this node defines something that is callable.
Method	`child_sequence`	Search for the sequence that contains this child.
Method	`eq`	Undocumented
Method	`get_children`	Get the child nodes below this node.
Method	`has_base`	Check if this node inherits from the given type.
Method	`infer`	Get a generator of the inferred values.
Method	`inferred`	Get a list of the inferred values.
Method	`instantiate_class`	Instantiate an instance of the defined class.
Method	`last_child`	An optimized version of list(get_children())[-1]
Method	`locate_child`	Find the field of this node that contains the given child.
Method	`next_sibling`	The next sibling statement node.
Method	`node_ancestors`	Yield parent, grandparent, etc until there are no more.
Method	`nodes_of_class`	Get the nodes (including this one or below) of the given types.
Method	`op_left_associative`	Undocumented
Method	`op_precedence`	Undocumented
Method	`parent_of`	Check if this node is the parent of the given node.
Method	`previous_sibling`	The previous sibling statement.
Method	`repr_tree`	Get a string representation of the AST from this node.
Method	`root`	Return the root node of the syntax tree.
Method	`statement`	The first parent node, including self, marked as statement node.
Class Variable	`is_function`	Whether this node indicates a function.
Class Variable	`is_lambda`	Undocumented
Class Variable	`is_statement`	Whether this node indicates a statement.
Instance Variable	`col_offset`	The column that this node appears on in the source code.
Instance Variable	`end_col_offset`	The end column this node appears on in the source code. Note: This is after the last symbol.
Instance Variable	`end_lineno`	The last line this node appears on in the source code.
Instance Variable	`lineno`	The line that this node appears on in the source code.
Instance Variable	`parent`	The parent node in the syntax tree.
Property	`fromlineno`	The first line that this node appears on in the source code.
Property	`tolineno`	The last line that this node appears on in the source code.
Method	`_fixed_source_line`	Attempt to find the line that this node appears on.
Method	`_get_assign_nodes`	Undocumented
Method	`_get_name_nodes`	Undocumented
Method	`_get_return_nodes_skip_functions`	Undocumented
Method	`_get_yield_nodes_skip_lambdas`	Undocumented
Method	`_infer`	we don't know how to resolve a statement by default
Method	`_infer_name`	Undocumented
Method	`_repr_name`	Get a name for nice representation.
Class Variable	`_explicit_inference`	Undocumented
Class Variable	`_other_fields`	Node attributes that do not contain child nodes.
Class Variable	`_other_other_fields`	Attributes that contain AST-dependent fields.

def __init__(self, lineno=None, col_offset=None, parent=None, *, end_lineno=None, end_col_offset=None): (source)

overrides astroid.nodes.NodeNG.__init__

Parameters
lineno:`Optional[int]`	The line that this node appears on in the source code.
col_offset:`Optional[int]`	The column that this node appears on in the source code.
parent:`Optional[NodeNG]`	The parent node in the syntax tree.
end_lineno:`Optional[int]`	The last line this node appears on in the source code.
end_col_offset:`Optional[int]`	The end column this node appears on in the source code. Note: This is after the last symbol.

def frame(self, *, future=None): (source)

overrides astroid.nodes.NodeNG.frame

The first parent frame node.

A frame node is a Module, FunctionDef, or ClassDef.

Parameters
future:`Literal[None, True]`	Undocumented
Returns
`Union[nodes.FunctionDef, nodes.Module, nodes.ClassDef, nodes.Lambda]`	The first parent frame node.

def postinit(self, target, value): (source)

Undocumented

Parameters
target:`NodeNG`	Undocumented
value:`NodeNG`	Undocumented

def scope(self): (source)

overrides astroid.nodes.NodeNG.scope

The first parent node defining a new scope. These can be Module, FunctionDef, ClassDef, Lambda, or GeneratorExp nodes.

Returns
`LocalsDictNodeNG`	The first parent scope node.

def set_local(self, name, stmt): (source)

overrides astroid.nodes.NodeNG.set_local

Define that the given name is declared in the given statement node. NamedExpr's in Arguments, Keyword or Comprehension are evaluated in their parent's parent scope. So we add to their frame's locals.

Parameters
name:`str`	The name that is being defined.
stmt:`AssignName`	The statement that defines the given name.