numpy.fft.hfft(a, n=None, axis=-1, norm=None)

numpy.sqrt(x[, out]) = Return the positive square-root of an array, element-wise.

numpy.random.random_integers(low, high=None, size=None) Random integers of type np.int between low

numpy.polynomial.polynomial.polyroots(c)

numpy.testing.decorators.knownfailureif(fail_condition, msg=None)

numpy.argpartition(a, kth, axis=-1, kind='introselect', order=None)

numpy.setdiff1d(ar1, ar2, assume_unique=False)

chararray.isalpha()

numpy.core.defchararray.isdecimal(a)

numpy.ppmt(rate, per, nper, pv, fv=0.0, when='end')