environment/lib/python2.7/site-packages/IPython/core/debugger.py
def list_command_pydb(self, arg):
        """List command to use if we have a newer pydb installed"""
        filename, first, last = OldPdb.parse_list_cmd(self, arg)
        if filename is not None:
            self.print_list_lines(filename, first, last)
def list_command_pydb(self, arg):
        """List command to use if we have a newer pydb installed"""
        filename, first, last = OldPdb.parse_list_cmd(self, arg)
        if filename is not None:
            self.print_list_lines(filename, first, last)
List command to use if we have a newer pydb installed