py2puml

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py2puml fails to inspect a dataclass using Optional as follows:

from dataclasses import dataclass
from typing import Optional
@dataclass
class MyData:
  data: Optional[bool]

ValueError: Could not resolve type typing.Union in module <module 'tests.modules.withoptional' from '.../py2puml/tests/modules/withoptional.py'>: it needs to be imported explicitly.

It is because Optional[bool] is dynamically converted into Union[bool, None] without adding both typing.Union and typing.Nonetype in the module wrapped by the ModuleResolver.