Current File : //opt/cloudlinux/venv/lib64/python3.11/site-packages/astroid/raw_building.py
# 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
"""this module contains a set of functions to create astroid trees from scratch
(build_* functions) or from living object (object_build_* functions)
"""
from __future__ import annotations
import builtins
import inspect
import io
import logging
import os
import sys
import types
import warnings
from collections.abc import Iterable
from contextlib import redirect_stderr, redirect_stdout
from typing import Any, Union
from astroid import bases, nodes
from astroid.const import _EMPTY_OBJECT_MARKER, IS_PYPY
from astroid.manager import AstroidManager
from astroid.nodes import node_classes
logger = logging.getLogger(__name__)
_FunctionTypes = Union[
types.FunctionType,
types.MethodType,
types.BuiltinFunctionType,
types.WrapperDescriptorType,
types.MethodDescriptorType,
types.ClassMethodDescriptorType,
]
# the keys of CONST_CLS eg python builtin types
_CONSTANTS = tuple(node_classes.CONST_CLS)
_BUILTINS = vars(builtins)
TYPE_NONE = type(None)
TYPE_NOTIMPLEMENTED = type(NotImplemented)
TYPE_ELLIPSIS = type(...)
def _attach_local_node(parent, node, name: str) -> None:
node.name = name # needed by add_local_node
parent.add_local_node(node)
def _add_dunder_class(func, member) -> None:
"""Add a __class__ member to the given func node, if we can determine it."""
python_cls = member.__class__
cls_name = getattr(python_cls, "__name__", None)
if not cls_name:
return
cls_bases = [ancestor.__name__ for ancestor in python_cls.__bases__]
ast_klass = build_class(cls_name, cls_bases, python_cls.__doc__)
func.instance_attrs["__class__"] = [ast_klass]
def attach_dummy_node(node, name: str, runtime_object=_EMPTY_OBJECT_MARKER) -> None:
"""create a dummy node and register it in the locals of the given
node with the specified name
"""
enode = nodes.EmptyNode()
enode.object = runtime_object
_attach_local_node(node, enode, name)
def attach_const_node(node, name: str, value) -> None:
"""create a Const node and register it in the locals of the given
node with the specified name
"""
if name not in node.special_attributes:
_attach_local_node(node, nodes.const_factory(value), name)
def attach_import_node(node, modname: str, membername: str) -> None:
"""create a ImportFrom node and register it in the locals of the given
node with the specified name
"""
from_node = nodes.ImportFrom(modname, [(membername, None)])
_attach_local_node(node, from_node, membername)
def build_module(name: str, doc: str | None = None) -> nodes.Module:
"""create and initialize an astroid Module node"""
node = nodes.Module(name, pure_python=False, package=False)
node.postinit(
body=[],
doc_node=nodes.Const(value=doc) if doc else None,
)
return node
def build_class(
name: str, basenames: Iterable[str] = (), doc: str | None = None
) -> nodes.ClassDef:
"""Create and initialize an astroid ClassDef node."""
node = nodes.ClassDef(name)
node.postinit(
bases=[nodes.Name(name=base, parent=node) for base in basenames],
body=[],
decorators=None,
doc_node=nodes.Const(value=doc) if doc else None,
)
return node
def build_function(
name: str,
args: list[str] | None = None,
posonlyargs: list[str] | None = None,
defaults: list[Any] | None = None,
doc: str | None = None,
kwonlyargs: list[str] | None = None,
kwonlydefaults: list[Any] | None = None,
) -> nodes.FunctionDef:
"""create and initialize an astroid FunctionDef node"""
# first argument is now a list of decorators
func = nodes.FunctionDef(name)
argsnode = nodes.Arguments(parent=func)
# If args is None we don't have any information about the signature
# (in contrast to when there are no arguments and args == []). We pass
# this to the builder to indicate this.
if args is not None:
arguments = [nodes.AssignName(name=arg, parent=argsnode) for arg in args]
else:
arguments = None
default_nodes: list[nodes.NodeNG] | None = []
if defaults is not None:
for default in defaults:
default_node = nodes.const_factory(default)
default_node.parent = argsnode
default_nodes.append(default_node)
else:
default_nodes = None
kwonlydefault_nodes: list[nodes.NodeNG | None] | None = []
if kwonlydefaults is not None:
for kwonlydefault in kwonlydefaults:
kwonlydefault_node = nodes.const_factory(kwonlydefault)
kwonlydefault_node.parent = argsnode
kwonlydefault_nodes.append(kwonlydefault_node)
else:
kwonlydefault_nodes = None
argsnode.postinit(
args=arguments,
defaults=default_nodes,
kwonlyargs=[
nodes.AssignName(name=arg, parent=argsnode) for arg in kwonlyargs or ()
],
kw_defaults=kwonlydefault_nodes,
annotations=[],
posonlyargs=[
nodes.AssignName(name=arg, parent=argsnode) for arg in posonlyargs or ()
],
)
func.postinit(
args=argsnode,
body=[],
doc_node=nodes.Const(value=doc) if doc else None,
)
if args:
register_arguments(func)
return func
def build_from_import(fromname: str, names: list[str]) -> nodes.ImportFrom:
"""create and initialize an astroid ImportFrom import statement"""
return nodes.ImportFrom(fromname, [(name, None) for name in names])
def register_arguments(func: nodes.FunctionDef, args: list | None = None) -> None:
"""add given arguments to local
args is a list that may contains nested lists
(i.e. def func(a, (b, c, d)): ...)
"""
# If no args are passed in, get the args from the function.
if args is None:
if func.args.vararg:
func.set_local(func.args.vararg, func.args)
if func.args.kwarg:
func.set_local(func.args.kwarg, func.args)
args = func.args.args
# If the function has no args, there is nothing left to do.
if args is None:
return
for arg in args:
if isinstance(arg, nodes.AssignName):
func.set_local(arg.name, arg)
else:
register_arguments(func, arg.elts)
def object_build_class(
node: nodes.Module | nodes.ClassDef, member: type, localname: str
) -> nodes.ClassDef:
"""create astroid for a living class object"""
basenames = [base.__name__ for base in member.__bases__]
return _base_class_object_build(node, member, basenames, localname=localname)
def _get_args_info_from_callable(
member: _FunctionTypes,
) -> tuple[list[str], list[str], list[Any], list[str], list[Any]]:
"""Returns args, posonlyargs, defaults, kwonlyargs.
:note: currently ignores the return annotation.
"""
signature = inspect.signature(member)
args: list[str] = []
defaults: list[Any] = []
posonlyargs: list[str] = []
kwonlyargs: list[str] = []
kwonlydefaults: list[Any] = []
for param_name, param in signature.parameters.items():
if param.kind == inspect.Parameter.POSITIONAL_ONLY:
posonlyargs.append(param_name)
elif param.kind == inspect.Parameter.POSITIONAL_OR_KEYWORD:
args.append(param_name)
elif param.kind == inspect.Parameter.VAR_POSITIONAL:
args.append(param_name)
elif param.kind == inspect.Parameter.VAR_KEYWORD:
args.append(param_name)
elif param.kind == inspect.Parameter.KEYWORD_ONLY:
kwonlyargs.append(param_name)
if param.default is not inspect.Parameter.empty:
kwonlydefaults.append(param.default)
continue
if param.default is not inspect.Parameter.empty:
defaults.append(param.default)
return args, posonlyargs, defaults, kwonlyargs, kwonlydefaults
def object_build_function(
node: nodes.Module | nodes.ClassDef, member: _FunctionTypes, localname: str
) -> None:
"""create astroid for a living function object"""
(
args,
posonlyargs,
defaults,
kwonlyargs,
kwonly_defaults,
) = _get_args_info_from_callable(member)
func = build_function(
getattr(member, "__name__", None) or localname,
args,
posonlyargs,
defaults,
member.__doc__,
kwonlyargs=kwonlyargs,
kwonlydefaults=kwonly_defaults,
)
node.add_local_node(func, localname)
def object_build_datadescriptor(
node: nodes.Module | nodes.ClassDef, member: type, name: str
) -> nodes.ClassDef:
"""create astroid for a living data descriptor object"""
return _base_class_object_build(node, member, [], name)
def object_build_methoddescriptor(
node: nodes.Module | nodes.ClassDef,
member: _FunctionTypes,
localname: str,
) -> None:
"""create astroid for a living method descriptor object"""
# FIXME get arguments ?
func = build_function(
getattr(member, "__name__", None) or localname, doc=member.__doc__
)
node.add_local_node(func, localname)
_add_dunder_class(func, member)
def _base_class_object_build(
node: nodes.Module | nodes.ClassDef,
member: type,
basenames: list[str],
name: str | None = None,
localname: str | None = None,
) -> nodes.ClassDef:
"""create astroid for a living class object, with a given set of base names
(e.g. ancestors)
"""
class_name = name or getattr(member, "__name__", None) or localname
assert isinstance(class_name, str)
klass = build_class(
class_name,
basenames,
member.__doc__,
)
klass._newstyle = isinstance(member, type)
node.add_local_node(klass, localname)
try:
# limit the instantiation trick since it's too dangerous
# (such as infinite test execution...)
# this at least resolves common case such as Exception.args,
# OSError.errno
if issubclass(member, Exception):
instdict = member().__dict__
else:
raise TypeError
except TypeError:
pass
else:
for item_name, obj in instdict.items():
valnode = nodes.EmptyNode()
valnode.object = obj
valnode.parent = klass
valnode.lineno = 1
klass.instance_attrs[item_name] = [valnode]
return klass
def _build_from_function(
node: nodes.Module | nodes.ClassDef,
name: str,
member: _FunctionTypes,
module: types.ModuleType,
) -> None:
# verify this is not an imported function
try:
code = member.__code__ # type: ignore[union-attr]
except AttributeError:
# Some implementations don't provide the code object,
# such as Jython.
code = None
filename = getattr(code, "co_filename", None)
if filename is None:
assert isinstance(member, object)
object_build_methoddescriptor(node, member, name)
elif filename != getattr(module, "__file__", None):
attach_dummy_node(node, name, member)
else:
object_build_function(node, member, name)
def _safe_has_attribute(obj, member: str) -> bool:
"""Required because unexpected RunTimeError can be raised.
See https://github.com/PyCQA/astroid/issues/1958
"""
try:
return hasattr(obj, member)
except Exception: # pylint: disable=broad-except
return False
class InspectBuilder:
"""class for building nodes from living object
this is actually a really minimal representation, including only Module,
FunctionDef and ClassDef nodes and some others as guessed.
"""
def __init__(self, manager_instance: AstroidManager | None = None) -> None:
self._manager = manager_instance or AstroidManager()
self._done: dict[types.ModuleType | type, nodes.Module | nodes.ClassDef] = {}
self._module: types.ModuleType
def inspect_build(
self,
module: types.ModuleType,
modname: str | None = None,
path: str | None = None,
) -> nodes.Module:
"""build astroid from a living module (i.e. using inspect)
this is used when there is no python source code available (either
because it's a built-in module or because the .py is not available)
"""
self._module = module
if modname is None:
modname = module.__name__
try:
node = build_module(modname, module.__doc__)
except AttributeError:
# in jython, java modules have no __doc__ (see #109562)
node = build_module(modname)
if path is None:
node.path = node.file = path
else:
node.path = [os.path.abspath(path)]
node.file = node.path[0]
node.name = modname
self._manager.cache_module(node)
node.package = hasattr(module, "__path__")
self._done = {}
self.object_build(node, module)
return node
def object_build(
self, node: nodes.Module | nodes.ClassDef, obj: types.ModuleType | type
) -> None:
"""recursive method which create a partial ast from real objects
(only function, class, and method are handled)
"""
if obj in self._done:
return None
self._done[obj] = node
for name in dir(obj):
# inspect.ismethod() and inspect.isbuiltin() in PyPy return
# the opposite of what they do in CPython for __class_getitem__.
pypy__class_getitem__ = IS_PYPY and name == "__class_getitem__"
try:
with warnings.catch_warnings():
warnings.simplefilter("ignore")
member = getattr(obj, name)
except AttributeError:
# damned ExtensionClass.Base, I know you're there !
attach_dummy_node(node, name)
continue
if inspect.ismethod(member) and not pypy__class_getitem__:
member = member.__func__
if inspect.isfunction(member):
_build_from_function(node, name, member, self._module)
elif inspect.isbuiltin(member) or pypy__class_getitem__:
if self.imported_member(node, member, name):
continue
object_build_methoddescriptor(node, member, name)
elif inspect.isclass(member):
if self.imported_member(node, member, name):
continue
if member in self._done:
class_node = self._done[member]
assert isinstance(class_node, nodes.ClassDef)
if class_node not in node.locals.get(name, ()):
node.add_local_node(class_node, name)
else:
class_node = object_build_class(node, member, name)
# recursion
self.object_build(class_node, member)
if name == "__class__" and class_node.parent is None:
class_node.parent = self._done[self._module]
elif inspect.ismethoddescriptor(member):
object_build_methoddescriptor(node, member, name)
elif inspect.isdatadescriptor(member):
object_build_datadescriptor(node, member, name)
elif isinstance(member, _CONSTANTS):
attach_const_node(node, name, member)
elif inspect.isroutine(member):
# This should be called for Jython, where some builtin
# methods aren't caught by isbuiltin branch.
_build_from_function(node, name, member, self._module)
elif _safe_has_attribute(member, "__all__"):
module = build_module(name)
_attach_local_node(node, module, name)
# recursion
self.object_build(module, member)
else:
# create an empty node so that the name is actually defined
attach_dummy_node(node, name, member)
return None
def imported_member(self, node, member, name: str) -> bool:
"""verify this is not an imported class or handle it"""
# /!\ some classes like ExtensionClass doesn't have a __module__
# attribute ! Also, this may trigger an exception on badly built module
# (see http://www.logilab.org/ticket/57299 for instance)
try:
modname = getattr(member, "__module__", None)
except TypeError:
modname = None
if modname is None:
if name in {"__new__", "__subclasshook__"}:
# Python 2.5.1 (r251:54863, Sep 1 2010, 22:03:14)
# >>> print object.__new__.__module__
# None
modname = builtins.__name__
else:
attach_dummy_node(node, name, member)
return True
# On PyPy during bootstrapping we infer _io while _module is
# builtins. In CPython _io names itself io, see http://bugs.python.org/issue18602
# Therefore, this basically checks whether we are not in PyPy.
if modname == "_io" and not self._module.__name__ == "builtins":
return False
real_name = {"gtk": "gtk_gtk"}.get(modname, modname)
if real_name != self._module.__name__:
# check if it sounds valid and then add an import node, else use a
# dummy node
try:
with redirect_stderr(io.StringIO()) as stderr, redirect_stdout(
io.StringIO()
) as stdout:
getattr(sys.modules[modname], name)
stderr_value = stderr.getvalue()
if stderr_value:
logger.error(
"Captured stderr while getting %s from %s:\n%s",
name,
sys.modules[modname],
stderr_value,
)
stdout_value = stdout.getvalue()
if stdout_value:
logger.info(
"Captured stdout while getting %s from %s:\n%s",
name,
sys.modules[modname],
stdout_value,
)
except (KeyError, AttributeError):
attach_dummy_node(node, name, member)
else:
attach_import_node(node, modname, name)
return True
return False
# astroid bootstrapping ######################################################
_CONST_PROXY: dict[type, nodes.ClassDef] = {}
def _set_proxied(const) -> nodes.ClassDef:
# TODO : find a nicer way to handle this situation;
return _CONST_PROXY[const.value.__class__]
def _astroid_bootstrapping() -> None:
"""astroid bootstrapping the builtins module"""
# this boot strapping is necessary since we need the Const nodes to
# inspect_build builtins, and then we can proxy Const
builder = InspectBuilder()
astroid_builtin = builder.inspect_build(builtins)
for cls, node_cls in node_classes.CONST_CLS.items():
if cls is TYPE_NONE:
proxy = build_class("NoneType")
proxy.parent = astroid_builtin
elif cls is TYPE_NOTIMPLEMENTED:
proxy = build_class("NotImplementedType")
proxy.parent = astroid_builtin
elif cls is TYPE_ELLIPSIS:
proxy = build_class("Ellipsis")
proxy.parent = astroid_builtin
else:
proxy = astroid_builtin.getattr(cls.__name__)[0]
assert isinstance(proxy, nodes.ClassDef)
if cls in (dict, list, set, tuple):
node_cls._proxied = proxy
else:
_CONST_PROXY[cls] = proxy
# Set the builtin module as parent for some builtins.
nodes.Const._proxied = property(_set_proxied)
_GeneratorType = nodes.ClassDef(types.GeneratorType.__name__)
_GeneratorType.parent = astroid_builtin
generator_doc_node = (
nodes.Const(value=types.GeneratorType.__doc__)
if types.GeneratorType.__doc__
else None
)
_GeneratorType.postinit(
bases=[],
body=[],
decorators=None,
doc_node=generator_doc_node,
)
bases.Generator._proxied = _GeneratorType
builder.object_build(bases.Generator._proxied, types.GeneratorType)
if hasattr(types, "AsyncGeneratorType"):
_AsyncGeneratorType = nodes.ClassDef(types.AsyncGeneratorType.__name__)
_AsyncGeneratorType.parent = astroid_builtin
async_generator_doc_node = (
nodes.Const(value=types.AsyncGeneratorType.__doc__)
if types.AsyncGeneratorType.__doc__
else None
)
_AsyncGeneratorType.postinit(
bases=[],
body=[],
decorators=None,
doc_node=async_generator_doc_node,
)
bases.AsyncGenerator._proxied = _AsyncGeneratorType
builder.object_build(bases.AsyncGenerator._proxied, types.AsyncGeneratorType)
if hasattr(types, "UnionType"):
_UnionTypeType = nodes.ClassDef(types.UnionType.__name__)
_UnionTypeType.parent = astroid_builtin
union_type_doc_node = (
nodes.Const(value=types.UnionType.__doc__)
if types.UnionType.__doc__
else None
)
_UnionTypeType.postinit(
bases=[],
body=[],
decorators=None,
doc_node=union_type_doc_node,
)
bases.UnionType._proxied = _UnionTypeType
builder.object_build(bases.UnionType._proxied, types.UnionType)
builtin_types = (
types.GetSetDescriptorType,
types.GeneratorType,
types.MemberDescriptorType,
TYPE_NONE,
TYPE_NOTIMPLEMENTED,
types.FunctionType,
types.MethodType,
types.BuiltinFunctionType,
types.ModuleType,
types.TracebackType,
)
for _type in builtin_types:
if _type.__name__ not in astroid_builtin:
klass = nodes.ClassDef(_type.__name__)
klass.parent = astroid_builtin
klass.postinit(
bases=[],
body=[],
decorators=None,
doc_node=nodes.Const(value=_type.__doc__) if _type.__doc__ else None,
)
builder.object_build(klass, _type)
astroid_builtin[_type.__name__] = klass
_astroid_bootstrapping()
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