1.遍历key值
1 >>> d = {‘Python‘:‘astonishing‘, ‘C++‘:‘complicated‘, ‘Java‘:‘versatile‘}
2 >>> for key in d:
3 ... print(key + ‘:‘ + d[key])
4 ...
5 Python:astonishing
6 C++:complicated
7 Java:versatile
同理，可把下列代码的d改为d.keys()
notice:python2除了上述两种方法外，还可以写为d.iterkeys()
2.遍历value值
1 >>> for value in d: 2 ... print(value) 3 ... 4 Python 5 C++ 6 Java
同理，可把下列代码的d改为d.values()
notice:python2除了上述两种方法外，还可以写为d.itervalues()
3.遍历字典
1 >>> for kv in d.items(): 2 ... print(kv) 3 ... 4 (‘Python‘, ‘astonishing‘) 5 (‘C++‘, ‘complicated‘) 6 (‘Java‘, ‘versatile‘) 7 >>> for k, v in d.items():#开始偷懒，缩写k, v 8 ... print(k + ‘:‘ + v) 9 ... 10 Python:astonishing 11 C++:complicated 12 Java:versatile
其实还有一种方法，用到了zip(元素对)使得我们可以像c/c++等语言一样循环两个变量
1 >>> for k, v in zip(d.keys(), d.values()): 2 ... print(k + ‘:‘ + v) 3 ... 4 Python:astonishing 5 C++:complicated 6 Java:versatile
关于zip的用法，详见python cookbook:https://python3-cookbook.readthedocs.io/zh_CN/latest/c04/p11_iterate_over_multiple_sequences_simultaneously.html
原文：https://www.cnblogs.com/geeksongs/p/11066425.html