python列表遍历死循环

代码片段截取

import time
m = [1]
for i in m:
    m.append(1)
    print(m)
    time.sleep(1)

输出结果展示

D:PycharmProjectspythonProjectvenvScriptspython.exe D:/PycharmProjects/pythonProject/main.py 
[1, 1]
[1, 1, 1]
[1, 1, 1, 1]
[1, 1, 1, 1, 1]
[1, 1, 1, 1, 1, 1]
Traceback (most recent call last):
  File "D:PycharmProjectspythonProjectmain.py", line 6, in 
    time.sleep(1)
KeyboardInterrupt

Process finished with exit code -1073741510 (0xC000013A: interrupted by Ctrl+C)

结果分析

 for循环遍历列表m时，在循环中动态增加了m的元素，导致无限循环。