The tp_print
method was removed from the API in Python 3.9. Error “‘tp_print’: is not a member of ‘_typeobject’” means that the code is intended for Python <= 3.8.
Downgrade to Python 3.8 and try again.
Upd. pyclipper
just released version 1.2.1 with wheels for Python 3.9.
PS. Never hurry to a newer major version of Python, wait until all your 3rd-party libraries adapt.