bpo-41681: Fix for `f-string/str.format` error description when using 2 `,` in format specifier (GH-22036)
* Fixed `f-string/str.format` error description when using two `,` in format specifier.
Co-authored-by: millefalcon <hanish0019@hmail.com>
diff --git a/Lib/test/test_fstring.py b/Lib/test/test_fstring.py
index 35a62a0..b9bede0 100644
--- a/Lib/test/test_fstring.py
+++ b/Lib/test/test_fstring.py
@@ -9,6 +9,7 @@
import ast
import os
+import re
import types
import decimal
import unittest
@@ -1198,6 +1199,25 @@
with self.assertRaisesRegex(SyntaxError, "f-string: invalid syntax"):
compile("f'{a $ b}'", "?", "exec")
+ def test_with_two_commas_in_format_specifier(self):
+ error_msg = re.escape("Cannot specify ',' with ','.")
+ with self.assertRaisesRegex(ValueError, error_msg):
+ f'{1:,,}'
+
+ def test_with_two_underscore_in_format_specifier(self):
+ error_msg = re.escape("Cannot specify '_' with '_'.")
+ with self.assertRaisesRegex(ValueError, error_msg):
+ f'{1:__}'
+
+ def test_with_a_commas_and_an_underscore_in_format_specifier(self):
+ error_msg = re.escape("Cannot specify both ',' and '_'.")
+ with self.assertRaisesRegex(ValueError, error_msg):
+ f'{1:,_}'
+
+ def test_with_an_underscore_and_a_comma_in_format_specifier(self):
+ error_msg = re.escape("Cannot specify both ',' and '_'.")
+ with self.assertRaisesRegex(ValueError, error_msg):
+ f'{1:,_}'
if __name__ == '__main__':
unittest.main()