numpy.fill_diagonal(a, val, wrap=False)

numpy.put(a, ind, v, mode='raise')

numpy.diag_indices(n, ndim=2)

numpy.ogrid = nd_grid instance which returns an open multi-dimensional ?meshgrid?. An instance of numpy

ndenumerate.next()

nditer.remove_axis(i) Removes axis i from the iterator. Requires that the flag ?multi_index? be enabled

nditer.next x.next() -> the next value, or raise StopIteration

numpy.tril_indices_from(arr, k=0)

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

flatiter.next x.next() -> the next value, or raise StopIteration