Invalid Syntax error on valid syntax

[ayushxx7]

    def __init__(self, ticket: Ticket, comment: Comment,
                 ticket_util: TicketUtility, helper: Helper):

I have an __init__ function takes in a couple parameters. This causes the line to be longer than the desired 79 characters,
so I thought I'll just move two params below (see the screenshot attached). At this point, I ended up seeing syntax error while this is perfectly valid python. Please help!