[Feature request] Support for typing hints

[pjljvandelaar]

I would like to use the full capability of mypy while using neo4j.

However, neo4j driver is not annotated for that purpose.
One gets

example.py:4: error: Skipping analyzing 'neo4j': found module but no type hints or library stubs
example.py:4: note: See https://mypy.readthedocs.io/en/latest/running_mypy.html#missing-imports

Adding # type: ignore after the import from neo4j import GraphDatabase as suggested on the provided html page only partly solves the problem.
I no longer am able to use the flag --disallow-any-expr on my complete archive.
On all neo4j related lines I now get:

example.py:17: error: Expression has type "Any"
example.py:19: error: Expression has type "Any"
example.py:22: error: Expression has type "Any"
example.py:30: error: Expression has type "Any"
example.py:31: error: Expression has type "Any"
example.py:33: error: Expression has type "Any"
example.py:35: error: Expression has type "Any"

So please add type annotations to the neo4j driver: I expect that it will prevent many subtle error in my and other user's code.
For me working with untyped graphs feels like walking a tight rope without a safety net!

[robsdedude]

Add type hints

[robsdedude]

Thanks for the suggestion. I've added the idea to our internal Trello wall. I can't promise that it will happen, though. Definitely not in the near future as other things have higher priority right now.

[robsdedude]

Good news. The first draft of type hints will be released soon in version 5.0.0a2

#767