Consider the following:

>>> a = (1‚ 2)  # not a comma, but unicode character.

Using Python 3.9 (and earlier), we get the following correct information

>>> a = (1‚ 2)
  File "<stdin>", line 1
    a = (1‚ 2)
          ^
SyntaxError: invalid character '‚' (U+201A)

Using Python 3.10, we get the following incorrect information instead:

>>> a = (1‚ 2)
  File "<stdin>", line 1
    a = (1‚ 2)
         ^
SyntaxError: invalid decimal literal