encountered in reduce return umr_sum(a, axis, dtype, out, keepdims, initial, where) [...\PETsARD\.venv\lib\site-packages\numpy\core\fromnumeric.py:88](.../PETsARD/.venv/lib/site-packages/numpy/core/fromnumeric.py:88): RuntimeWarning: invalid value encountered in reduce return ufunc....