Traceback (most recent call last):
  File "bot.py", line 13, in <module>
    from telegram.ext import (
  File "/home/tejaratk/.local/lib/python3.6/site-packages/telegram/ext/__init__.py", line 31, in <module>
    from .updater import Updater
  File "/home/tejaratk/.local/lib/python3.6/site-packages/telegram/ext/updater.py", line 55, in <module>
    class Updater(Generic[CCT, UD, CD, BD]):
  File "/home/tejaratk/.local/lib/python3.6/site-packages/telegram/ext/updater.py", line 198, in Updater
    dispatcher: Dispatcher[CCT, UD, CD, BD] = None,
  File "/usr/lib64/python3.6/typing.py", line 682, in inner
    return func(*args, **kwds)
  File "/usr/lib64/python3.6/typing.py", line 1143, in __getitem__
    orig_bases=self.__orig_bases__)
  File "/usr/lib64/python3.6/typing.py", line 978, in __new__
    self = super().__new__(cls, name, bases, namespace, _root=True)
  File "/usr/lib64/python3.6/typing.py", line 137, in __new__
    return super().__new__(cls, name, bases, namespace)
  File "/usr/bin/../lib64/python3.6/abc.py", line 133, in __new__
    cls = super().__new__(mcls, name, bases, namespace, **kwargs)
TypeError: __dict__ slot disallowed: we already got one