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import sys
def is_instance(obj, klass):
"""Version of is_instance that doesn't access __class__"""
return issubclass(type(obj), klass)
class SomeClass(object):
class_attribute = None
def wibble(self):
pass
class X(object):
pass
def examine_warnings(func):
def wrapper():
with catch_warnings(record=True) as ws:
func(ws)
return wrapper
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