`_utcfromtimestamp` is undefined in `datetimetester`

[sobolevn]

Bug report

This code cannot run correctly:

cpython/Lib/test/datetimetester.py

Lines 6221 to 6227 in 55402d3

	def nondst_folds(self):
	"""Find all folds with the same value of isdst on both sides of the transition."""
	for (_, prev_ti), (t, ti) in pairs(zip(self.ut, self.ti)):
	shift = ti[0] - prev_ti[0]
	if shift < ZERO and ti[1] == prev_ti[1]:
	yield _utcfromtimestamp(datetime, t,), -shift, prev_ti[2], ti[2]

Because _utcfromtimestamp is not defined anywhere.

Introduced in 38dc3f2 by @pganssle

I think that this is a typo, I will send a PR.

This was introduced when datetime.utcfromtimestamp was deprecated, I propose to use a direct alternative: datetime.fromtimestamp(t, datetime.UTC)

This problem is not detected by tests, because this looks like a in-test helper for module maintainers. It is not used as of right now.

Linked PRs

• gh-120266: Fix undefined _utcfromtimestamp name in datetimetester #120267