def check(self, line_info):
if line_info.the_rest:<EOL><INDENT>if line_info.the_rest[<NUM_LIT:0>] in '<STR_LIT>':<EOL><INDENT>return self.prefilter_manager.get_handler_by_name('<STR_LIT>')<EOL><DEDENT><DEDENT>else:<EOL><INDENT>return None<EOL><DEDENT>
Check to see if user is assigning to a var for the first time, in
        which case we want to avoid any sort of automagic / autocall games.

        This allows users to assign to either alias or magic names true python
        variables (the magic/alias systems always take second seat to true
        python code).  E.g. ls='hi', or ls,that=1,2