def assert_less_equal(a, b, msg=None):
    message = "%r is not lower than or equal to %r" % (a, b)
    if msg is not None:
        message += ": " + msg
    assert b <= a, message
dataset/ETHPy150Open scikit-learn/scikit-learn/sklearn/utils/testing.py/assert_less_equal/swapped operands of `<=`