numpy.putmask(a, mask, values) Changes elements of an array based on conditional and input values. Sets a.flat[n]

numpy.c_ = Translates slice objects to concatenation along the second axis. This is short-hand for np.r_['-1,2,0', index

numpy.s_ = A nicer way to build up index tuples for arrays. Note

class numpy.lib.Arrayterator(var, buf_size=None)

numpy.triu_indices(n, k=0, m=None)

numpy.choose(a, choices, out=None, mode='raise')

numpy.diag_indices_from(arr)

numpy.unravel_index(indices, dims, order='C') Converts a flat index or array of flat indices into a tuple of coordinate

numpy.diagonal(a, offset=0, axis1=0, axis2=1)

numpy.take(a, indices, axis=None, out=None, mode='raise')