/usr/local/lib/python3.6/dist-packages/numpy/lib/function_base.py:3405: RuntimeWarning: All-NaN slice encountered
  r = func(a, **kwargs)
/usr/local/lib/python3.6/dist-packages/numpy/lib/nanfunctions.py:1354: RuntimeWarning: All-NaN slice encountered
  overwrite_input, interpolation)
/usr/local/lib/python3.6/dist-packages/numdifftools/limits.py:173: RuntimeWarning: invalid value encountered in less
  outliers = (((abs(der) < (a_median / trim_fact)) +
/usr/local/lib/python3.6/dist-packages/numdifftools/limits.py:174: RuntimeWarning: invalid value encountered in greater
  (abs(der) > (a_median * trim_fact))) * (a_median > 1e-8) +
/usr/local/lib/python3.6/dist-packages/numdifftools/limits.py:175: RuntimeWarning: invalid value encountered in less
  ((der < p25-1.5*iqr) + (p75+1.5*iqr < der)))
/usr/local/lib/python3.6/dist-packages/numdifftools/limits.py:149: UserWarning: All-NaN slice encountered
  warnings.warn(str(msg))

{"usertime":0.47,"memmax":61976,"memavg":0}