iframe-proxy | Sunbelt Computer Software

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#!/usr/bin/env python

# -*- encoding: utf-8 -*-

"""

Topic: 各种迭代示例

Desc :

"""

def loop_demo():

# dict的迭代

knights = {'gallahad': 'the pure', 'robin': 'the brave'}

for k, v in knights.items():

print(k, v)

# sequence序列迭代：

for i, v in enumerate(['tic', 'tac', 'toe']):

print(i, v)

# 同时迭代多个序列，使用zip函数

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))

# 反向迭代

for i in reversed(['name', 'quest', 'favorite color']):

print(i)

# 迭代同时修改，使用a[:]隐藏copy一个新对象

words = ['cat', 'window', 'defenestrate']

for w in words[:]:

if len(w) > 6:

words.insert(0, w)

if __name__ == '__main__':

loop_demo()

Sunbelt Computer Software