gh-83461: Don't allow datetime parsing to accept non-ASCII digits

Lib/_strptime.py

@@ -14,6 +14,7 @@
 import time
 import locale
 import calendar
+from re import A as re_A
 from re import compile as re_compile
 from re import sub as re_sub
 from re import IGNORECASE
@@ -380,7 +381,7 @@ def repl(m):
 
     def compile(self, format):
         """Return a compiled re object for the format string."""
-        return re_compile(self.pattern(format), IGNORECASE)
+        return re_compile(self.pattern(format), IGNORECASE | re_A)
 
 _cache_lock = _thread_allocate_lock()
 # DO NOT modify _TimeRE_cache or _regex_cache without acquiring the cache lock

Lib/test/datetimetester.py

@@ -2916,6 +2916,9 @@ def test_strptime(self):
         with self.assertRaises(ValueError): strptime("-000", "%z")
         with self.assertRaises(ValueError): strptime("z", "%z")
 
+        # test only ascii is allowed
+        with self.assertRaises(ValueError): strptime('٢025-03-09', '%Y-%m-%d')
+
     def test_strptime_single_digit(self):
         # bpo-34903: Check that single digit dates and times are allowed.
 

Misc/NEWS.d/next/Library/2025-03-09-11-01-00.gh-issue-83461.auwd13.rst

@@ -0,0 +1 @@
+:func:`datetime.datetime.strptime` now only accepts ASCII input.