Having worked in Python and other languages for many years, I can tell you that 1) this doesn't matter and 2) many of the ways people write Python are much uglier than the conventional formatting in other languages. Most notably:

    this_is_my_very_long_function_name_and_here_come_the_args(self,
                                                              foo,
                                                              bar,
                                                              baz)