dict1={"a":1,"b":2,"c":3}
for k,v in dict1.items():
print k,v
a 1
c 3
b 2
#用iter的形势比较节省内存
for k,v in dict1.iteritems():
print k,v
a 1
c 3
b 2
for k in dict1.iterkeys():
print k
a
c
b
for v in dict1.itervalues():
print v
1
3
2
原文：http://www.cnblogs.com/dadadechengzi/p/6292455.html