numpy.testing.assert_allclose(actual, desired, rtol=1e-07, atol=0, equal_nan=False, err_msg='', verbose=True)

numpy.arctan(x[, out]) = Trigonometric inverse tangent, element-wise. The inverse of tan, so that if y = tan(x)

numpy.real(val)

numpy.polynomial.polynomial.polyval2d(x, y, c)

numpy.fft.rfftn(a, s=None, axes=None, norm=None)

chararray.isalnum()

numpy.issubclass_(arg1, arg2)

ndarray.tolist() Return the array as a (possibly nested) list. Return a copy of the array data as a (nested) Python

numpy.linalg.eigvals(a)

dtype.descr Array-interface compliant full description of the data-type. The format is that required by the ?descr