test_plugin.py

#!/bin/env python2
# coding: utf-8


import types


class Structure(object):
    ''' Some sort of a data container '''
    def __init__(self, value=42):
        print "Creating structure with value = %s" % value
        self.value = value


def show(self, symbol):
    ''' Actual visualisation function '''
    print symbol*self.value + "\n"

showtime = lambda self: show(self, '*')


if __name__ == "__main__":
    s = Structure(19)
    s.show = types.MethodType(showtime, s)

    s.show()