https://github.com/python/cpython/commit/18501a11e0358130a6bc48fee339ba3892e9e191
commit: 18501a11e0358130a6bc48fee339ba3892e9e191
branch: 3.13
author: Miss Islington (bot) <31488909+miss-isling...@users.noreply.github.com>
committer: picnixz <10796600+picn...@users.noreply.github.com>
date: 2025-05-10T15:57:29Z
summary:
[3.13] gh-132642: document how to render human-readable `timedelta` objects
(GH-133825) (#133836)
gh-132642: document how to render human-readable `timedelta` objects (GH-133825)
(cherry picked from commit efcc42ba70fb09333a2be16401da731662e2984b)
Co-authored-by: Kentaro Jay Takahashi
<64148935+kentaro...@users.noreply.github.com>
files:
M Doc/library/datetime.rst
M Lib/test/datetimetester.py
diff --git a/Doc/library/datetime.rst b/Doc/library/datetime.rst
index 708258a3d8dc9e..99a979038adb2c 100644
--- a/Doc/library/datetime.rst
+++ b/Doc/library/datetime.rst
@@ -261,6 +261,22 @@ A :class:`timedelta` object represents a duration, the
difference between two
>>> (d.days, d.seconds, d.microseconds)
(-1, 86399, 999999)
+ Since the string representation of :class:`!timedelta` objects can be
confusing,
+ use the following recipe to produce a more readable format:
+
+ .. code-block:: pycon
+
+ >>> def pretty_timedelta(td):
+ ... if td.days >= 0:
+ ... return str(td)
+ ... return f'-({-td!s})'
+ ...
+ >>> d = timedelta(hours=-1)
+ >>> str(d) # not human-friendly
+ '-1 day, 23:00:00'
+ >>> pretty_timedelta(d)
+ '-(1:00:00)'
+
Class attributes:
diff --git a/Lib/test/datetimetester.py b/Lib/test/datetimetester.py
index 952176bee632f7..44c5b28f455af0 100644
--- a/Lib/test/datetimetester.py
+++ b/Lib/test/datetimetester.py
@@ -762,6 +762,9 @@ def test_str(self):
microseconds=999999)),
"999999999 days, 23:59:59.999999")
+ # test the Doc/library/datetime.rst recipe
+ eq(f'-({-td(hours=-1)!s})', "-(1:00:00)")
+
def test_repr(self):
name = 'datetime.' + self.theclass.__name__
self.assertEqual(repr(self.theclass(1)),
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