1 #!/usr/bin/env python 2 3 a = 1 4 5 class X: 6 def __contains__(self, other): 7 return 1 8 9 x = X() 10 11 result_5 = 0 12 result_6 = 6 13 14 if a in x: 15 result_5 = 5 16 17 if a not in x: 18 result_6 = 0 19 20 # vim: tabstop=4 expandtab shiftwidth=4