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gh-103193: Use LBYL idioms rather than EAFP in inspect.getattr_static (#103318)

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Alex Waygood 2023-04-06 20:17:53 +01:00 • committed by GitHub
parent 1724553e6e
commit affedee8bf
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1 changed files with 10 additions and 15 deletions
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25
Lib/inspect.py
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@ -1787,11 +1787,8 @@ def _check_instance(obj, attr):
def _check_class(klass, attr):
for entry in _static_getmro(klass):
if _shadowed_dict(type(entry)) is _sentinel:
try:
return entry.__dict__[attr]
except KeyError:
pass
if _shadowed_dict(type(entry)) is _sentinel and attr in entry.__dict__:
return entry.__dict__[attr]
return _sentinel
def _is_type(obj):
@ -1803,11 +1800,9 @@ def _is_type(obj):
def _shadowed_dict(klass):
for entry in _static_getmro(klass):
try:
class_dict = _get_dunder_dict_of_class(entry)["__dict__"]
except KeyError:
pass
else:
dunder_dict = _get_dunder_dict_of_class(entry)
if '__dict__' in dunder_dict:
class_dict = dunder_dict['__dict__']
if not (type(class_dict) is types.GetSetDescriptorType and
class_dict.__name__ == "__dict__" and
class_dict.__objclass__ is entry):
@ -1850,11 +1845,11 @@ def getattr_static(obj, attr, default=_sentinel):
if obj is klass:
# for types we check the metaclass too
for entry in _static_getmro(type(klass)):
if _shadowed_dict(type(entry)) is _sentinel:
try:
return entry.__dict__[attr]
except KeyError:
pass
if (
_shadowed_dict(type(entry)) is _sentinel
and attr in entry.__dict__
):
return entry.__dict__[attr]
if default is not _sentinel:
return default
raise AttributeError(attr)