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遍历字典key值
a = {'a': '1', 'b': '2', 'c': '3'} for i in a.keys(): print(i) ## y与下面代码等价 for i in a: print(i)
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遍历字典value值
a = {'a': '1', 'b': '2', 'c': '3'} for value in a.values(): print(value)
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遍历字典项
for kv in a.items(): print(kv) # kv是元祖
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遍历字典键值
for key,value in a.items(): print(key+':'+value)