I'm creating a shared dict for multiprocessing purposes:

from multiprocessing import Manager

manager = Manager()
shared_dict = manager.dict()

If I add a set or a list as a value in the dict:
shared_dict['test'] = set() or shared_dict['test'] = list()

I can't add/append in that set/list inside the shared dictionary:
shared_dict['test'].add(1234) or shared_dict['test'].append(1234)

The following expression:
print(dict(shared_dict))

Will return:
{'test': set()} or {'test': []}.

But if I add in the set/list using operators:
shared_dict['test'] |= {1234} or shared_dict['test'] += [1234]

It will work:
{'test': {1234}} or {'test': [1234]}.