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