Fix python 3.11 compatibility issue (#4)

Grab python 3.11 compatibility issue fix from:
pykalman#101

pykalman/tests/test_unscented.py

@@ -59,15 +59,15 @@ def check_dims(n_dim_state, n_dim_obs, n_func_args, kf_cls, kwargs):
  if not 'transition_functions' in kwargs
  else (len(kwargs['transition_functions']),)
  )
- assert all([len(inspect.getargspec(f).args) == n_func_args
+ assert all([len(inspect.getfullargspec(f).args) == n_func_args
  for f in transition_functions])
  assert transition_covariance.shape == (n_dim_state, n_dim_state)
  assert (
  observation_functions.shape == (1,)
  if not 'observation_functions' in kwargs
  else (len(kwargs['observation_functions']),)
  )
- assert all([len(inspect.getargspec(f).args) == n_func_args
+ assert all([len(inspect.getfullargspec(f).args) == n_func_args
  for f in observation_functions])
  assert observation_covariance.shape == (n_dim_obs, n_dim_obs)
  assert initial_state_mean.shape == (n_dim_state,)

pykalman/utils.py

@@ -102,7 +102,7 @@ def get_params(obj):
  '''Get names and values of all parameters in `obj`'s __init__'''
  try:
  # get names of every variable in the argument
- args = inspect.getargspec(obj.__init__)[0]
+ args = inspect.getfullargspec(obj.__init__)[0]
  args.pop(0) # remove "self"
 
  # get values for each of the above in the object