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Add Python 3.15 calendar datetime and difflib updates by JelleZijlstra · Pull Request #15729 · python/typeshed · GitHub

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Add Python 3.15 calendar datetime and difflib updates #15729

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Merged
JelleZijlstra merged 3 commits into from
May 8, 2026
Conversation 4 Commits 3 Checks 55 Files changed
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Add Python 3.15 calendar datetime and difflib updates #15729

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a631519
Add Python 3.15 calendar datetime and difflib updates
JelleZijlstra May 8, 2026
5b9fc3d
Guard datetime 3.15 parameter names
JelleZijlstra May 8, 2026
b9e4d3e
Merge remote-tracking branch 'upstream/main' into codex/python315-cal…
JelleZijlstra May 8, 2026
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11 changes: 0 additions & 11 deletions stdlib/@tests/stubtest_allowlists/py315.txt
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Original file line number Diff line number Diff line change
Expand Up @@ -112,10 +112,6 @@ binascii.b2a_base32
binascii.b2a_base64
binascii.b2a_base85
binascii.unhexlify
calendar.HTMLCalendar.formatmonthpage
calendar.__all__
calendar.standalone_month_abbr
calendar.standalone_month_name
codecs.backslashreplace_errors
codecs.ignore_errors
codecs.namereplace_errors
Expand All @@ -140,13 +136,6 @@ ctypes.SetPointerType
dataclasses._MISSING_TYPE
dataclasses.MISSING
dataclasses.field
datetime.date.fromisoformat
datetime.date.strptime
datetime.datetime.fromisoformat
datetime.datetime.strptime
datetime.time.fromisoformat
datetime.time.strptime
difflib.unified_diff
doctest.DocTestRunner.report_skip
enum.__all__
enum.auto.__init__
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11 changes: 11 additions & 0 deletions stdlib/calendar.pyi
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Original file line number Diff line number Diff line change
Expand Up @@ -57,6 +57,8 @@ if sys.version_info >= (3, 12):
"NOVEMBER",
"DECEMBER",
]
if sys.version_info >= (3, 15):
__all__ += ["standalone_month_name", "standalone_month_abbr"]

_LocaleType: TypeAlias = tuple[str | None, str | None]

Expand Down Expand Up @@ -127,6 +129,11 @@ class HTMLCalendar(Calendar):
def formatweekheader(self) -> str: ...
def formatmonthname(self, theyear: int, themonth: int, withyear: bool = True) -> str: ...
def formatmonth(self, theyear: int, themonth: int, withyear: bool = True) -> str: ...
if sys.version_info >= (3, 15):
def formatmonthpage(
self, theyear: int, themonth: int, width: int = 3, css: str | None = "calendar.css", encoding: str | None = None
) -> bytes: ...

def formatyear(self, theyear: int, width: int = 3) -> str: ...
def formatyearpage(
self, theyear: int, width: int = 3, css: str | None = "calendar.css", encoding: str | None = None
Expand Down Expand Up @@ -212,3 +219,7 @@ else:
SUNDAY: Final = 6

EPOCH: Final = 1970

if sys.version_info >= (3, 15):
standalone_month_name: Sequence[str]
standalone_month_abbr: Sequence[str]
Comment on lines +224 to +225

srittau May 8, 2026

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Choose a reason Spam Abuse Off Topic Outdated Duplicate Resolved Low Quality

The situation here is more complicated. There are instances of _localized_month, which isn't a full Sequence, but has other format field. Same actually for month_name and month_abbr. day_name and day_abbr are not instances of _localized_day. But the latter has been true since at least 3.10, so I'm fine with using Sequence in this PR, although I would prepare a followup, changing these fields.

Another thing I noticed, although that's probably legacy and possibly also out of scope: Through __getattr__, this module has two constants "January" (equaling 1), and "February" (equaling 2).

JelleZijlstra May 8, 2026

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Choose a reason Spam Abuse Off Topic Outdated Duplicate Resolved Low Quality

Thanks, I'll prepare a followup for this.

Regarding the __getattr__, seems better to keep those out of the stub unless someone really needs them.
46 changes: 36 additions & 10 deletions stdlib/datetime.pyi
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Original file line number Diff line number Diff line change
Expand Up @@ -63,8 +63,13 @@ class date:
def today(cls) -> Self: ...
@classmethod
def fromordinal(cls, n: int, /) -> Self: ...
@classmethod
def fromisoformat(cls, date_string: str, /) -> Self: ...
if sys.version_info >= (3, 15):
@classmethod
def fromisoformat(cls, string: str, /) -> Self: ...
else:
@classmethod
def fromisoformat(cls, date_string: str, /) -> Self: ...

@classmethod
def fromisocalendar(cls, year: int, week: int, day: int) -> Self: ...
@property
Expand All @@ -76,8 +81,12 @@ class date:
def ctime(self) -> str: ...

if sys.version_info >= (3, 14):
@classmethod
def strptime(cls, date_string: str, format: str, /) -> Self: ...
if sys.version_info >= (3, 15):
@classmethod
def strptime(cls, string: str, format: str, /) -> Self: ...
else:
@classmethod
def strptime(cls, date_string: str, format: str, /) -> Self: ...

# On <3.12, the name of the parameter in the pure-Python implementation
# didn't match the name in the C implementation,
Expand Down Expand Up @@ -147,12 +156,20 @@ class time:
def __eq__(self, value: object, /) -> bool: ...
def __hash__(self) -> int: ...
def isoformat(self, timespec: str = "auto") -> str: ...
@classmethod
def fromisoformat(cls, time_string: str, /) -> Self: ...
if sys.version_info >= (3, 15):
@classmethod
def fromisoformat(cls, string: str, /) -> Self: ...
else:
@classmethod
def fromisoformat(cls, time_string: str, /) -> Self: ...

if sys.version_info >= (3, 14):
@classmethod
def strptime(cls, date_string: str, format: str, /) -> Self: ...
if sys.version_info >= (3, 15):
@classmethod
def strptime(cls, string: str, format: str, /) -> Self: ...
else:
@classmethod
def strptime(cls, date_string: str, format: str, /) -> Self: ...

# On <3.12, the name of the parameter in the pure-Python implementation
# didn't match the name in the C implementation,
Expand Down Expand Up @@ -291,6 +308,10 @@ class datetime(date):
def utcnow(cls) -> Self: ...
@classmethod
def combine(cls, date: _Date, time: _Time, tzinfo: _TzInfo | None = ...) -> Self: ...
if sys.version_info >= (3, 15):
@classmethod
def fromisoformat(cls, string: str, /) -> Self: ...

def timestamp(self) -> float: ...
def utctimetuple(self) -> struct_time: ...
def date(self) -> _Date: ...
Expand Down Expand Up @@ -327,8 +348,13 @@ class datetime(date):
) -> Self: ...
def astimezone(self, tz: _TzInfo | None = None) -> Self: ...
def isoformat(self, sep: str = "T", timespec: str = "auto") -> str: ...
@classmethod
def strptime(cls, date_string: str, format: str, /) -> Self: ...
if sys.version_info >= (3, 15):
@classmethod
def strptime(cls, string: str, format: str, /) -> Self: ...
else:
@classmethod
def strptime(cls, date_string: str, format: str, /) -> Self: ...

def utcoffset(self) -> timedelta | None: ...
def tzname(self) -> str | None: ...
def dst(self) -> timedelta | None: ...
Expand Down
37 changes: 27 additions & 10 deletions stdlib/difflib.pyi
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Expand Up @@ -69,16 +69,33 @@ else:
def IS_LINE_JUNK(line: str, pat: Callable[[str], re.Match[str] | None] = ...) -> bool: ...

def IS_CHARACTER_JUNK(ch: str, ws: str = " \t") -> bool: ... # ws is undocumented
def unified_diff(
a: Sequence[str],
b: Sequence[str],
fromfile: str = "",
tofile: str = "",
fromfiledate: str = "",
tofiledate: str = "",
n: int = 3,
lineterm: str = "\n",
) -> Iterator[str]: ...

if sys.version_info >= (3, 15):
def unified_diff(
a: Sequence[str],
b: Sequence[str],
fromfile: str = "",
tofile: str = "",
fromfiledate: str = "",
tofiledate: str = "",
n: int = 3,
lineterm: str = "\n",
*,
color: bool = False,
) -> Iterator[str]: ...

else:
def unified_diff(
a: Sequence[str],
b: Sequence[str],
fromfile: str = "",
tofile: str = "",
fromfiledate: str = "",
tofiledate: str = "",
n: int = 3,
lineterm: str = "\n",
) -> Iterator[str]: ...

def context_diff(
a: Sequence[str],
b: Sequence[str],
Expand Down
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