1 class C: 2 l = [2, 4, 6, 8, 10] 3 s = "test" 4 def __init__(self, x): 5 self.x = x 6 self.y = 3 7 self.z = "zebra libre" 8 def __len__(self): 9 return len(self.z) 10 11 c = C([1]) 12 x = c.x 13 f = c.x.__len__ 14 print c # <__main__.C instance> 15 print x # [1] 16 print f # __builtins__.list.list.__len__ 17 print f() # 1 18 19 y = c.l 20 g = c.l.__len__ 21 print y # [2, 4, 6, 8, 10] 22 print g # __builtins__.list.list.__len__ 23 print g() # 5 24 25 yy = C.l 26 gg = C.l.__len__ 27 print yy # [2, 4, 6, 8, 10] 28 print gg # __builtins__.list.list.__len__ 29 print gg() # 5 30 31 z = c.s 32 h = c.s.__len__ 33 print z # test 34 print h # __builtins__.str.basestring.__len__ 35 print h() # 4 36 37 zz = C.s 38 hh = C.s.__len__ 39 print zz # test 40 print hh # __builtins__.str.basestring.__len__ 41 print hh() # 4 42 43 a = c.y 44 b = c.z 45 i = c.z.__len__ 46 print a # 3 47 print b # zebra libre 48 print i # __builtins__.str.basestring.__len__ 49 print i() # 11 50 51 j = C.__len__ 52 k = get_using(j, c) 53 try: 54 print j() 55 except UnboundMethodInvocation: 56 print "j(): invocation of method with class context" 57 print k() # 11
