#!/usr/bin/env python
# -*- coding:utf-8 -*-
class Cstr(str):
_add = "egg"
def __new__(cls, s):
return str.__new__(cls,
" ".join([s, cls._add]))
if __name__ == "__main__":
s = Cstr("spam")
print s
IyEvdXNyL2Jpbi9lbnYgcHl0aG9uCiMgLSotIGNvZGluZzp1dGYtOCAtKi0KCgpjbGFzcyBDc3RyKHN0cik6CiAgICBfYWRkID0gImVnZyIKCiAgICBkZWYgX19uZXdfXyhjbHMsIHMpOgogICAgICAgIHJldHVybiBzdHIuX19uZXdfXyhjbHMsCiAgICAgICAgICAgICAgICAgICAgICAgICAgICIgIi5qb2luKFtzLCBjbHMuX2FkZF0pKQoKaWYgX19uYW1lX18gPT0gIl9fbWFpbl9fIjoKICAgIHMgPSBDc3RyKCJzcGFtIikKICAgIHByaW50IHM=