def ne_(a, b, msg=None):
    'Assert a != b, with repr messaging on failure.'
    assert (a != b), (msg or ('%r == %r' % (a, b)))
Assert a != b, with repr messaging on failure.
def ne_(a, b, msg=None):
    
    assert (a != b), (msg or ('%r == %r' % (a, b)))