已解决 - 为什么两个连续的 for 循环都不执行？答案

【问题标题】：Solved-Why aren't both consecutive for loops executed?已解决 - 为什么两个连续的 for 循环都不执行？
【发布时间】：2020-11-08 22:53:09
【问题描述】：

[初学者提醒] 我正在编写代码并记录它们的变化。我想将这个 for 循环的变体组合在一个文件中，但只执行第一个。为什么以及我必须做什么才能实现这一目标？

teams = ['Dragons', 'Wolves', 'Pandas', 'Unicorns']
n = 1

for home_team in teams:
    for away_team in teams[n:]:     # This block causes the execution to increase n by one
        if home_team != away_team:  # for every away_team in one home_team
            print(home_team, away_team)  # then proceeds to the next home_team
            n += 1

for home_team in teams:
    for away_team in teams[n:]:     # This block causes the execution to increase n by one
        if home_team != away_team:  # for every home_team
            print(home_team, away_team)
    n += 1

【问题讨论】：

第二个循环开始时n 的值是多少？
相同的值，我明白你的意思，谢谢！

标签： python order-of-execution nested-for-loop

【解决方案1】：

第二部分假设 n 的值自第一部分结束以来没有改变，导致执行不打印任何结果。 [由 Mark Meyer 暗示。]

【讨论】：