在字典中循環時，關鍵字和對應的值可以使用?iteritems()?方法同時解讀出來: ~~~ >>> knights = {'gallahad': 'the pure', 'robin': 'the brave'} >>> for k, v in knights.items(): ... print(k, v) ... gallahad the pure robin the brave ~~~ 在序列中循環時，索引位置和對應值可以使用?enumerate()?函數同時得到: ~~~ >>> for i, v in enumerate(['tic', 'tac', 'toe']): ... print(i, v) ... 0 tic 1 tac 2 toe ~~~ 同時循環兩個或更多的序列，可以使用?zip()?整體打包: ~~~ >>> questions = ['name', 'quest', 'favorite color'] >>> answers = ['lancelot', 'the holy grail', 'blue'] >>> for q, a in zip(questions, answers): ... print('What is your {0}? It is {1}.'.format(q, a)) ... What is your name? It is lancelot. What is your quest? It is the holy grail. What is your favorite color? It is blue. ~~~ 需要逆向循環序列的話，先正向定位序列，然后調用?reversed()?函數: ~~~ >>> for i in reversed(range(1, 10, 2)): ... print(i) ... 9 7 5 3 1 ~~~ 要按排序后的順序循環序列的話，使用?sorted()?函數，它不改動原序列，而是生成一個新的已排序的序列: ~~~ >>> basket = ['apple', 'orange', 'apple', 'pear', 'orange', 'banana'] >>> for f in sorted(set(basket)): ... print(f) ... apple banana orange pear ~~~