test_multiarray.py 文件源码

def test_unbuffered_fromfile(self):
        # gh-6246
        self.x.tofile(self.filename)

        def fail(*args, **kwargs):
            raise io.IOError('Can not tell or seek')

        with io.open(self.filename, 'rb', buffering=0) as f:
            f.seek = fail
            f.tell = fail
            y = np.fromfile(self.filename, dtype=self.dtype)
            assert_array_equal(y, self.x.flat)