/usr/local/lib/python2.7/dist-packages/numdifftools/limits.py:182: FutureWarning: arrays to stack must be passed as a "sequence" type such as list or tuple. Support for non-sequence iterables such as generators is deprecated as of NumPy 1.16 and will raise an error in the future.
  f_del = np.vstack(list(np.ravel(r)) for r in sequence)
/usr/local/lib/python2.7/dist-packages/numdifftools/limits.py:184: FutureWarning: arrays to stack must be passed as a "sequence" type such as list or tuple. Support for non-sequence iterables such as generators is deprecated as of NumPy 1.16 and will raise an error in the future.
  for step in steps)

{"usertime":2.33,"memmax":63740,"memavg":0}