numpy.trace(a, offset=0, axis1=0, axis2=1, dtype=None, out=None)

numpy.issubsctype(arg1, arg2)

numpy.tril_indices_from(arr, k=0)

ndarray.flatten(order='C') Return a copy of the array collapsed into one dimension.

RandomState.choice(a, size=None, replace=True, p=None) Generates a random sample from a given 1-D array

numpy.ma.squeeze(a, axis=None)

numpy.dsplit(ary, indices_or_sections)

RandomState.noncentral_chisquare(df, nonc, size=None) Draw samples from a noncentral chi-square

numpy.ma.flatnotmasked_contiguous(a)

numpy.vander(x, N=None, increasing=False)