the fix is as simple as replacing line 111 of shell.py by:
f_args, f_varargs, f_kwargs, f_defaults, _, _, _ = inspect.getfullargspec(command_func)
the fix is as simple as replacing line 111 of shell.py by:
f_args, f_varargs, f_kwargs, f_defaults, _, _, _ = inspect. getfullargspec( command_ func)