ENH: add NAType to PandasScalar type

[j-carson]

Feature Type

• Adding new functionality to pandas

• Changing existing functionality in pandas

• Removing existing functionality in pandas

Problem Description

I have a chunk of code where I create a series of Nulls -

pd.Series(
    index=myKeys,
    data=pd.NA,
    name="my_name"
)

I am having type-checking issues

error: No overload variant of "Series" matches argument types "Index[Any]", "NAType", "str"  [call-overload]

I believe it may be because pd.NA is not a valid scalar

_typing.py line 121

PandasScalar = Union["Period", "Timestamp", "Timedelta", "Interval"]

Feature Description

PandasScalar = Union["Period", "Timestamp", "Timedelta", "Interval", "NAType"]

Alternative Solutions

# type: ignore 

Or maybe I need to open an enhancement request to pandas-stubs library instead? please advise if so.

Additional Context

No response

[twoertwein]

Based on your error, I assume you are using mypy, which makes me believe that the annotations that mypy are complaining about are from pandas-stubs and not pandas (mypy does not analyze annotations of non-py.typed libraries, pyright does). If that is the case, please open an issue at pandas-stubs. The same issue might also apply to pandas itself (I haven't checked that yet), so this issue could also stay open.

[twoertwein]

This seems to be a pandas-stubs issue: pandas does not have any annotations for data
https://github.com/pandas-dev/pandas/blob/6a65c64e77d625f55f7b17e2a270014e5bd49e31/pandas/core/series.py#L383

[j-carson]

@twoertwein Thank you for moving the issue for me -- I got busy with the holidays :-)