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# Licensed under the LGPL: https://www.gnu.org/licenses/old-licenses/lgpl-2.1.en.html
# For details: https://github.com/PyCQA/astroid/blob/main/LICENSE
# Copyright (c) https://github.com/PyCQA/astroid/blob/main/CONTRIBUTORS.txt
from __future__ import annotations
from astroid import arguments, inference_tip, nodes
from astroid.context import InferenceContext
from astroid.exceptions import UseInferenceDefault
from astroid.manager import AstroidManager
def infer_namespace(node, context: InferenceContext | None = None):
callsite = arguments.CallSite.from_call(node, context=context)
if not callsite.keyword_arguments:
# Cannot make sense of it.
raise UseInferenceDefault()
class_node = nodes.ClassDef("Namespace")
# Set parent manually until ClassDef constructor fixed:
# https://github.com/PyCQA/astroid/issues/1490
class_node.parent = node.parent
for attr in set(callsite.keyword_arguments):
fake_node = nodes.EmptyNode()
fake_node.parent = class_node
fake_node.attrname = attr
class_node.instance_attrs[attr] = [fake_node]
return iter((class_node.instantiate_class(),))
def _looks_like_namespace(node) -> bool:
func = node.func
if isinstance(func, nodes.Attribute):
return (
func.attrname == "Namespace"
and isinstance(func.expr, nodes.Name)
and func.expr.name == "argparse"
)
return False
AstroidManager().register_transform(
nodes.Call, inference_tip(infer_namespace), _looks_like_namespace
)
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