def le_(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 le_(a, b, msg=None):
    
    assert (a <= b), (msg or ('%r != %r' % (a, b)))