python如何在中断操作（ctrl-c）后，再执行一段代码再关闭？

Question

如题，我在写一个爬虫过程中，因为不太好预估数据量，打算设置一个直接手动停止的功能。目前想到的比较方便的办法就是捕获ctrl+C终止命令，然后利用try except方法终止。但是一个前提是在捕获中断操作后，要保存之前通过while循环获得的数据。
我写了一个测试代码，但是发现（ctrl+c中断后并不执行后续的"there it is？"）

import time  
  
try:  
  while True:  
  print('yes!')  
        time.sleep(1)  
except Exception as e:  
  print(e)
  pass
  
print('there it is!')

Answer 1

KeyboardInterrupt:

• exception KeyboardInterrupt

Raised when the user hits the interrupt key (normally Control-C or Delete). During execution, a check for interrupts is made regularly. The exception inherits from BaseException so as to not be accidentally caught by code that catches Exception and thus prevent the interpreter from exiting.

KeyboardInterrupt 故意做成不是从 Exception 继承来的，而是来自 BaseException，为的就是不被 execpt Exception 捕获。

你可以直接写 except KeyboardInterrupt as e: 。