New semantic analyzer: Namespace package with __init__.py breaks analysis

I'm getting a lot of errors reported that are not errors.

• Classes are reported as invalid types
• Calls to methods are reported as modules not having those attributes
• Instances of classes are reported as modules not callable
• Types passed to, e.g., isinstance are reported as incompatible type Module (suggests that all custom types are treated as type Module)
• Base classes are reported as invalid base classes
• Calls to instances of classes are reported as not having the specified attributes
• Package imports in __init__.py are reported as already defined

I am not sure whether these are issues are caused by the new semantic analyzer or by the Mypy plugin for PyCharm which has not been updated yet.

In comparison, with the new semantic analyzer disabled, there are no errors. The application works correctly.

Der Issue nennt keine Dateien oder Tests. Beginne damit, die gemeldeten False Positives mit einem Namespace-Paket zu reproduzieren, das init.py enthält, vergleiche den neuen semantischen Analyzer mit deaktiviertem Analyzer und berücksichtige die Unterscheidung des PyCharm-Plugins. Abgeschlossen ist die Aufgabe, wenn die aufgeführten Fehler zu Klassen, Methoden, Instanzen, Vererbung und Paket-Imports für die Reproduktion nicht mehr gemeldet werden.