chararray.islower()

numpy.random.rand(d0, d1, ..., dn) Random values in a given shape. Create an array of the given shape and populate

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

chararray.isalpha()

MaskedArray.var(axis=None, dtype=None, out=None, ddof=0)

numpy.percentile(a, q, axis=None, out=None, overwrite_input=False, interpolation='linear', keepdims=False)

classmethod Polynomial.basis(deg, domain=None, window=None)

chararray.lower()

ndindex.ndincr()

classmethod Polynomial.identity(domain=None, window=None)