File: support.py

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python3.4 3.4.2-1
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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