def fnmatch_multiple(candidates, pattern):
    '''
    Convenience function which runs fnmatch.fnmatch() on each element of passed
    iterable. The first matching candidate is returned, or None if there is no
    matching candidate.
    '''
    # Make sure that candidates is iterable to avoid a TypeError when we try to
    # iterate over its items.
    try:
        candidates_iter = iter(candidates)
    except TypeError:
        return None

    for candidate in candidates_iter:
        try:
            if fnmatch.fnmatch(candidate, pattern):
                return candidate
        except TypeError:
            pass
    return None
Convenience function which runs fnmatch.fnmatch() on each element of passed
    iterable. The first matching candidate is returned, or None if there is no
    matching candidate.