test_multiarray.py 文件源码

def test_matmul_inplace():
        # It would be nice to support in-place matmul eventually, but for now
        # we don't have a working implementation, so better just to error out
        # and nudge people to writing "a = a @ b".
        a = np.eye(3)
        b = np.eye(3)
        assert_raises(TypeError, a.__imatmul__, b)
        import operator
        assert_raises(TypeError, operator.imatmul, a, b)
        # we avoid writing the token `exec` so as not to crash python 2's
        # parser
        exec_ = getattr(builtins, "exec")
        assert_raises(TypeError, exec_, "a @= b", globals(), locals())