gh-120268: Prohibit passing None to _pydatetime.date.fromtimestamp (#120269)

This makes the pure Python implementation consistent with the C implementation.

Author: Eclips4

Lib/_pydatetime.py

@@ -966,6 +966,8 @@ def __new__(cls, year, month=None, day=None):
  @classmethod
  def fromtimestamp(cls, t):
  "Construct a date from a POSIX timestamp (like time.time())."
+ if t is None:
+ raise TypeError("'NoneType' object cannot be interpreted as an integer")
  y, m, d, hh, mm, ss, weekday, jday, dst = _time.localtime(t)
  return cls(y, m, d)
 

Lib/test/datetimetester.py

@@ -1336,6 +1336,11 @@ def test_insane_fromtimestamp(self):
  self.assertRaises(OverflowError, self.theclass.fromtimestamp,
  insane)
 
+ def test_fromtimestamp_with_none_arg(self):
+ # See gh-120268 for more details
+ with self.assertRaises(TypeError):
+ self.theclass.fromtimestamp(None)
+
  def test_today(self):
  import time
 

Misc/NEWS.d/next/Library/2024-06-08-14-36-40.gh-issue-120268.MNpd1q.rst

@@ -0,0 +1,2 @@
+Prohibit passing ``None`` to pure-Python :meth:`datetime.date.fromtimestamp`
+to achieve consistency with C-extension implementation.