1 def f(d): 2 return d.keys() 3 4 def g(d): 5 for key, value in d.items(): 6 return value 7 8 d = {10 : "a", 20 : "b", "c" : 30} 9 print d 10 print d[10] # a 11 print d[20] # b 12 print d["c"] # 30 13 try: 14 print d[30] # should fail with an exception 15 except KeyError, exc: 16 print "d[30]: key not found", exc.key 17 18 l = f(d) 19 print l 20 print 10 in l # True 21 print 20 in l # True 22 print "c" in l # True 23 print 30 in l # False 24 25 l = d.values() 26 print l 27 print "a" in l # True 28 print "b" in l # True 29 print 30 in l # True 30 print "c" in l # False 31 32 v = g(d) # either "a" or "b" or 30 33 print v 34 print v == "a" or v == "b" or v == 30 # True 35 print v == 10 or v == 20 or v == "c" # False 36 37 l = d.items() 38 print l 39 print (10, "a") in l # True 40 print ("c", 30) in l # True 41 print (10, "b") in l # False