DOK.nnz

DOK.nnz

The number of nonzero elements in this array.

Returns

The number of nonzero elements.

Return type

int

See also

COO.nnz

Equivalent COO array property.

numpy.count_nonzero

A similar Numpy function.

scipy.sparse.dok_matrix.nnz

The Scipy equivalent property.

Examples

>>> values = {
...     (1, 2, 3): 4,
...     (3, 2, 1): 0,
... }
>>> s = DOK((5, 5, 5), values)
>>> s.nnz
1