def testmodf(name, (v1, v2), (e1, e2)):
    if abs(v1-e1) > eps or abs(e2-v2):
        raise TestFailed, '%s returned %r, expected %r'%\
              (name, (v1,v2), (e1,e2))
dataset/ETHPy150Open babble/babble/include/jython/Lib/test/test_math.py/testmodf/swapped operands of `-`