Current approach of __setstate__ and __deepcopy__ fails when attribute names of an object ≠ the expected argument names (e.g. a class taking attr as argument, but the self variable is assigned as: self._attr = attr).

Also fails when there are extra args and the constructor does not accept **kwargs.
So will redesign this.

Another way to achieve deepcopying without actually defining __deepcopy__, would be to use was_called_by in __getstate__ as follows:

import copy
from telegram.ext._utils.stack import was_called_by 
...
if was_called_by(inspect.currentframe(), Path(copy.__file__)):
    return self._get_attrs(include_private=True, recursive=False)
return self._get_attrs(include_private=True, recursive=False, remove_bot=True)

but didn't use this since it feels a bit hacky and unpythonic, although its elegant.

@Bibo-Joshi Nope, all done and am happy with it now