to_datetime().array gives the generic ExtensionArray, but it turns out to be DatetimeArray

[cmp0xff]

Describe the bug

to_datetime().array gives the generic ExtensionArray, but it turns out to be DatetimeArray at run time.

Reproduce

Minimal runnable example

from typing import assert_type
import pandas as pd

arr = pd.to_datetime(["2020-01-01", "2020-01-02"]).array
assert_type(arr, pd.arrays.DatetimeArray)  # type checker: ExtensionArray
assert isinstance(arr, pd.arrays.DatetimeArray)  # no exception

Error messages

pyright

error: "assert_type" mismatch: expected "DatetimeArray" but received "ExtensionArray" (reportAssertTypeFailure)

mypy

error: Expression is of type "ExtensionArray", not "DatetimeArray"  [assert-type]

Please complete the following information

• OS: Windows
• OS Version: 11
• python version: 3.12.10
• version of type checker
  • mypy 1.17.1 (compiled: yes)
  • pyright 1.1.405
• version of installed pandas-stubs: 2.3.2.250827

Additional context

Nope

[Dr-Irv]

Need to override array in pandas-stubs\core\indexes\datetimes.pyi

[cmp0xff]

Hi @Dr-Irv , thank you for the quick triage 🙂 How about beginner friendly instead of good first issue? I would like to focus on the long-lasting PRs for dropping semantic series (TimestampSeries, etc), and leave other smaller fixes as issues.

[Dr-Irv]

Hi @Dr-Irv , thank you for the quick triage 🙂 How about beginner friendly instead of good first issue? I would like to focus on the long-lasting PRs for dropping semantic series (TimestampSeries, etc), and leave other smaller fixes as issues.

Well, in my mind "good first issue" means "beginner friendly". No need for you to be the one to fix it

[gamal1osama]

Need to override array in pandas-stubs\core\indexes\datetimes.pyi

@Dr-Irv I'm working on this right now and will submit a PR with the fix.
Can you assign this issue to me to ensure against duplicated effort?

[Dr-Irv]

@Dr-Irv I'm working on this right now and will submit a PR with the fix. Can you assign this issue to me to ensure against duplicated effort?

Done. Note that you should include a test as well