bpo-35066: _dateime.datetime.strftime copies trailing '%' (GH-10692)
Previously, calling the strftime() method on a datetime object with a
trailing '%' in the format string would result in an exception. However,
this only occured when the datetime C module was being used; the python
implementation did not match this behavior. Datetime is now PEP-399
compliant, and will not throw an exception on a trailing '%'.
diff --git a/Lib/test/datetimetester.py b/Lib/test/datetimetester.py
index 2f838c4..d729c7e 100644
--- a/Lib/test/datetimetester.py
+++ b/Lib/test/datetimetester.py
@@ -1351,6 +1351,17 @@
#check that this standard extension works
t.strftime("%f")
+ def test_strftime_trailing_percent(self):
+ # bpo-35066: make sure trailing '%' doesn't cause
+ # datetime's strftime to complain
+ t = self.theclass(2005, 3, 2)
+ try:
+ _time.strftime('%')
+ except ValueError:
+ self.skipTest('time module does not support trailing %')
+ self.assertEqual(t.strftime('%'), '%')
+ self.assertEqual(t.strftime("m:%m d:%d y:%y %"), "m:03 d:02 y:05 %")
+
def test_format(self):
dt = self.theclass(2007, 9, 10)
self.assertEqual(dt.__format__(''), str(dt))