Add type hints to vFrequency

[arjunrawal1]

Summary

• Adds explicit type hints to vFrequency.__new__, to_ical, and from_ical.
• Keeps runtime behavior unchanged while continuing the rolling type-hinting work from Add type hints [beginner, Python, typing] #938.

Refs #938

Testing

• python3 -m pytest src/icalendar/tests/prop/test_constructors.py src/icalendar/tests/prop/test_unit.py src/icalendar/tests/rfc_7265_jcal/test_invalid_jcal.py -q — 751 passed

Note: I also tried python3 -m mypy src/icalendar/prop/recur/frequency.py, but mypy is not installed in this local environment.

[read-the-docs-community]

Documentation build overview

📚 icalendar | 🛠️ Build #32530250 | 📁 Comparing d2aa8ef against latest (7357cec)

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4 files changed

± 404.html
± reference/changelog.html
± reference/api/icalendar.prop.recur.frequency.html
± _modules/icalendar/prop/recur/frequency.html

[stevepiercy]

Thanks for the PR! Let me know what you think.

[stevepiercy]

Same as above.

Suggested change

	def from_ical(cls, ical: Any) -> Self:
	def from_ical(cls, ical: ICAL_TYPE) -> Self:

[stevepiercy]

I think the use of Any is too loose. We have a special variable that you can import. Try this out, and let me know.

Modify the import.

from icalendar.parser_tools import DEFAULT_ENCODING, ICAL_TYPE, to_unicode

Then:

Suggested change

	value: Any,
	value: ICAL_TYPE,