TYP: drop

[twoertwein]

Tested with mypy and pyright:

import pandas as pd

def bool_() -> bool:
    ...

df = pd.DataFrame({"a": []})
ser = pd.Series({"a": 1, "b": 2})

# DataFrame/Series
reveal_type(df.drop(columns="a"))
reveal_type(df.drop(columns="a", inplace=False))
reveal_type(ser.drop(index="a"))
reveal_type(ser.drop(index="a", inplace=False))

# None
reveal_type(df.drop(columns="a", inplace=True))
reveal_type(ser.drop(index="a", inplace=True))

# both
reveal_type(df.drop(columns="a", inplace=bool_()))
reveal_type(ser.drop(index="a", inplace=bool_()))

[twoertwein]

I also added it to a few other functions (there might be more that only accept ignore/raise).

[twoertwein]

This deprecation is new. Previously, this deprecation was only in Series/DataFrame.

[Dr-Irv]

Just add a reference to the mypy issue you created so we can track it.