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# Copyright (c) 2019-2021 hippo91 <guillaume.peillex@gmail.com>
# Copyright (c) 2019-2020 Claudiu Popa <pcmanticore@gmail.com>
# Copyright (c) 2021 Pierre Sassoulas <pierre.sassoulas@gmail.com>
# Copyright (c) 2021 Marc Mueller <30130371+cdce8p@users.noreply.github.com>
# 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
"""Different utilities for the numpy brains"""
from typing import Tuple
from astroid.builder import extract_node
from astroid.nodes.node_classes import Attribute, Import, Name, NodeNG
# Class subscript is available in numpy starting with version 1.20.0
NUMPY_VERSION_TYPE_HINTS_SUPPORT = ("1", "20", "0")
def numpy_supports_type_hints() -> bool:
"""
Returns True if numpy supports type hints
"""
np_ver = _get_numpy_version()
return np_ver and np_ver > NUMPY_VERSION_TYPE_HINTS_SUPPORT
def _get_numpy_version() -> Tuple[str, str, str]:
"""
Return the numpy version number if numpy can be imported. Otherwise returns
('0', '0', '0')
"""
try:
import numpy # pylint: disable=import-outside-toplevel
return tuple(numpy.version.version.split("."))
except ImportError:
return ("0", "0", "0")
def infer_numpy_member(src, node, context=None):
node = extract_node(src)
return node.infer(context=context)
def _is_a_numpy_module(node: Name) -> bool:
"""
Returns True if the node is a representation of a numpy module.
For example in :
import numpy as np
x = np.linspace(1, 2)
The node <Name.np> is a representation of the numpy module.
:param node: node to test
:return: True if the node is a representation of the numpy module.
"""
module_nickname = node.name
potential_import_target = [
x for x in node.lookup(module_nickname)[1] if isinstance(x, Import)
]
for target in potential_import_target:
if ("numpy", module_nickname) in target.names or (
"numpy",
None,
) in target.names:
return True
return False
def looks_like_numpy_member(member_name: str, node: NodeNG) -> bool:
"""
Returns True if the node is a member of numpy whose
name is member_name.
:param member_name: name of the member
:param node: node to test
:return: True if the node is a member of numpy
"""
if (
isinstance(node, Attribute)
and node.attrname == member_name
and isinstance(node.expr, Name)
and _is_a_numpy_module(node.expr)
):
return True
if (
isinstance(node, Name)
and node.name == member_name
and node.root().name.startswith("numpy")
):
return True
return False
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