Traceback (most recent call last):


 "/home/ryuta/graalpython/isinstance/regexpattern.py", line 5, in <module 'regexpattern.py'>

if isinstance(pattern, Pattern):
TypeError: isinstance() arg 2 must be a type or tuple of types (was: <class 'int'>)


Traceback (most recent call last):


 "C:\Users\Sri\AppData\Roaming\Python\Python38\site-packages\jupyterhub\app.py", line 2715, in launch_instance_async

await self.initialize(argv)


 "C:\Users\Sri\AppData\Roaming\Python\Python38\site-packages\jupyterhub\app.py", line 2286, in initialize

await self.init_users()


 "C:\Users\Sri\AppData\Roaming\Python\Python38\site-packages\jupyterhub\app.py", line 1597, in init_users

if self.authenticator.enable_auth_state:


 "C:\Users\Sri\AppData\Roaming\Python\Python38\site-packages\traitlets\traitlets.py", line 556, in __get__

return self.get(obj, cls)


 "C:\Users\Sri\AppData\Roaming\Python\Python38\site-packages\traitlets\traitlets.py", line 535, in get

value = self._validate(obj, dynamic_default())


 "C:\Users\Sri\AppData\Roaming\Python\Python38\site-packages\jupyterhub\app.py", line 918, in _authenticator_default

return self.authenticator_class(parent=self, db=self.db)


 "C:\Users\Sri\AppData\Roaming\Python\Python38\site-packages\jupyterhub\auth.py", line 863, in __init__

raise _pamela_error from None


 "C:\Users\Sri\AppData\Roaming\Python\Python38\site-packages\jupyterhub\auth.py", line 16, in <module>

import pamela


 "C:\Users\Sri\AppData\Roaming\Python\Python38\site-packages\pamela.py", line 49, in <module>

LIBPAM = CDLL(find_library("pam"))


 "C:\Program 
s\Python38\lib\ctypes\__init__.py", line 363, in __init__

if '/' in name or '\\' in name:

TypeError: argument of type 'NoneType' is not iterable
