Thank you for the report, but this behavior is already documented at https://docs.python.org/3/library/tokenize.html

    To simplify token stream handling, all Operators and Delimiters
    tokens are returned using the generic token.OP token type. The
    exact type can be determined by checking the exact_type property
    on the named tuple returned from tokenize.tokenize().

If you replace the following line

    print(ellipsis)

with

    print(ellipsis.exact_type)

you will see that it prints '52'.