in python3.3

(k, v ...

in python3.3

(k, v) == (key, value)


sort by key

for k, v in sorted(h.items(), key = lambda t:t[0]):  
    print("%s: %s" % (k, v))  

t[0] means key


sort by value

for k, v in sorted(h.items(), key = lambda t:t[1]):  
    print("%s: %s" % (k, v))  

t[1] means value

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