Tipragot
628be439b8
Cela permet de ne pas avoir de problèmes de compatibilité car python est dans le git.
78 lines
2.5 KiB
Python
78 lines
2.5 KiB
Python
# Licensed under the LGPL: https://www.gnu.org/licenses/old-licenses/lgpl-2.1.en.html
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# For details: https://github.com/pylint-dev/astroid/blob/main/LICENSE
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# Copyright (c) https://github.com/pylint-dev/astroid/blob/main/CONTRIBUTORS.txt
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"""Contains logic for retrieving special methods.
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This implementation does not rely on the dot attribute access
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logic, found in ``.getattr()``. The difference between these two
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is that the dunder methods are looked with the type slots
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(you can find more about these here
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http://lucumr.pocoo.org/2014/8/16/the-python-i-would-like-to-see/)
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As such, the lookup for the special methods is actually simpler than
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the dot attribute access.
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"""
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from __future__ import annotations
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import itertools
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from typing import TYPE_CHECKING
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import astroid
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from astroid.exceptions import AttributeInferenceError
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if TYPE_CHECKING:
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from astroid import nodes
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from astroid.context import InferenceContext
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def _lookup_in_mro(node, name) -> list:
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attrs = node.locals.get(name, [])
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nodes = itertools.chain.from_iterable(
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ancestor.locals.get(name, []) for ancestor in node.ancestors(recurs=True)
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)
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values = list(itertools.chain(attrs, nodes))
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if not values:
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raise AttributeInferenceError(attribute=name, target=node)
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return values
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def lookup(
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node: nodes.NodeNG, name: str, context: InferenceContext | None = None
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) -> list:
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"""Lookup the given special method name in the given *node*.
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If the special method was found, then a list of attributes
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will be returned. Otherwise, `astroid.AttributeInferenceError`
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is going to be raised.
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"""
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if isinstance(
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node, (astroid.List, astroid.Tuple, astroid.Const, astroid.Dict, astroid.Set)
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):
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return _builtin_lookup(node, name)
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if isinstance(node, astroid.Instance):
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return _lookup_in_mro(node, name)
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if isinstance(node, astroid.ClassDef):
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return _class_lookup(node, name, context=context)
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raise AttributeInferenceError(attribute=name, target=node)
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def _class_lookup(
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node: nodes.ClassDef, name: str, context: InferenceContext | None = None
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) -> list:
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metaclass = node.metaclass(context=context)
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if metaclass is None:
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raise AttributeInferenceError(attribute=name, target=node)
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return _lookup_in_mro(metaclass, name)
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def _builtin_lookup(node, name) -> list:
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values = node.locals.get(name, [])
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if not values:
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raise AttributeInferenceError(attribute=name, target=node)
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return values
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