Python wrap pending exception

1, pending exception

import sys
class CustomException(Exception):
    """
    Wrap arbitrary pending exception,
    if any, in addition to other info.
    """
    def __init__(self, *args):
        Exception.__init__(self, *args)
        self.wrapped_exc = sys.exc_info()
def call_wrapped(callable, *args, **kwargs):
    try:
        return callable(*args, **kwargs)
    except:
        raise CustomException('Wrapped function '
                              'propagated exception')
def f(x):
    return 1 / x
a = call_wrapped(f, 0)
print(a)