blocks|key|1510250|text|exit()应该可以解决这个问题|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1510251|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

blocks|key|1510295|text|exit()应该可以做到这一点。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1510296|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

blocks|key|1510319|text|如果整个程序应该停止，请使用sys.exit()，否则只需使用空返回。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1510320|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

If the entire program should stop use sys.exit() otherwise just use an empty return.

blocks|key|1510339|text|import+sys
sys.exit()|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|1510340|unstyled|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|G|8|@]|9|@]|A|$B|C]]|$1|D|3|-4|5|E|7|H|8|@]|9|@]|A|$]]]|F|$]]

<pre><code>import sys
sys.exit()
</code></pre>

blocks|key|1725454|text|您可以将脚本的主体放入一个函数中，然后可以从该函数返回。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1725455|def+main():
++done+=+True
++if+done:
++++return
++++#+quit/stop/exit
++else:
++++#+do+other+stuff

if+__name__+==+"__main__":
++#Run+as+main+program
++main()|code-block|syntax|javascript|1725456|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

You could put the body of your script into a function and then you could return from that function.

<pre><code>def main():
 done = True
 if done:
 return
 # quit/stop/exit
 else:
 # do other stuff

if __name__ == "__main__":
 #Run as main program
 main()
</code></pre>

blocks|key|1725503|text|要退出您可以使用的脚本，|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1725504|import+sys
sys.exit()|code-block|syntax|javascript|1725505|您还可以提供退出状态值，通常是一个整数。|1725506|import+sys
sys.exit(0)|1725507|以零退出，这通常被解释为成功。非零码通常被视为错误。默认情况下，退出时为零。|1725508|import+sys
sys.exit("aa!+errors!")|1725509|打印"aa！错误！“并退出，状态代码为1。|1725510|在os模块中还有一个_exit()函数。sys.exit()函数引发SystemExit异常以退出程序，因此可以执行try语句和清理代码。os._exit()版本不会这样做。它只是在不做任何清理或刷新输出缓冲区的情况下结束程序，所以通常不应该使用它。|offset|length|1725511|Python+docs指示os._exit()是结束通过调用os.fork()创建的子进程的正常方式，因此它在某些情况下确实有用处。|1725512|entityMap|0|LINK|mutability|MUTABLE|url|http://docs.python.org/2/library/sys.html#sys.exit|1|http://docs.python.org/2/library/os.html#os._exit^0|0|0|0|0|0|0|0|K|A|0|0|0|B|1|0^^$0|@$1|2|3|4|5|6|7|16|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|17|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|18|8|@]|9|@]|A|$]]|$1|I|3|J|5|D|7|19|8|@]|9|@]|A|$E|F]]|$1|K|3|L|5|6|7|1A|8|@]|9|@]|A|$]]|$1|M|3|N|5|D|7|1B|8|@]|9|@]|A|$E|F]]|$1|O|3|P|5|6|7|1C|8|@]|9|@]|A|$]]|$1|Q|3|R|5|6|7|1D|8|@]|9|@$S|1E|T|1F|1|1G]]|A|$]]|$1|U|3|V|5|6|7|1H|8|@]|9|@$S|1I|T|1J|1|1K]]|A|$]]|$1|W|3|-4|5|6|7|1L|8|@]|9|@]|A|$]]]|X|$Y|$5|Z|10|11|A|$12|13]]|14|$5|Z|10|11|A|$12|15]]]]

To exit a script you can use,

<pre><code>import sys
sys.exit()
</code></pre>

You can also provide an exit status value, usually an integer.

<pre><code>import sys
sys.exit(0)
</code></pre>

Exits with zero, which is generally interpreted as success. Non-zero codes are usually treated as errors. The default is to exit with zero.

<pre><code>import sys
sys.exit("aa! errors!")
</code></pre>

Prints "aa! errors!" and exits with a status code of 1.

There is also an _exit() function in the os module. The <a href="http://docs.python.org/2/library/sys.html#sys.exit" rel="noreferrer">sys.exit()</a> function raises a SystemExit exception to exit the program, so try statements and cleanup code can execute. The os._exit() version doesn't do this. It just ends the program without doing any cleanup or flushing output buffers, so it shouldn't normally be used. 

The <a href="http://docs.python.org/2/library/os.html#os._exit" rel="noreferrer">Python docs</a> indicate that os._exit() is the normal way to end a child process created with a call to os.fork(), so it does have a use in certain circumstances.

blocks|key|1725566|text|试一试|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1725567|sys.exit("message")|code-block|syntax|javascript|1725568|它就像perl一样|1725569|die("message")|1725570|如果这就是你要找的。即使从导入的模块/定义/function中调用它，它也会终止脚本的执行|1725571|entityMap^0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|O|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|P|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|Q|8|@]|9|@]|A|$]]|$1|I|3|J|5|D|7|R|8|@]|9|@]|A|$E|F]]|$1|K|3|L|5|6|7|S|8|@]|9|@]|A|$]]|$1|M|3|-4|5|6|7|T|8|@]|9|@]|A|$]]]|N|$]]

Try

<pre><code>sys.exit("message")
</code></pre>

It is like the perl

<pre><code>die("message")
</code></pre>

if this is what you are looking for. It terminates the execution of the script even it is called from an imported module / def /function

I have a simple Python script that I want to stop executing if a condition is met.

For example:

<pre><code>done = True
if done:
 # quit/stop/exit
else:
 # do other stuff
</code></pre>

Essentially, I am looking for something that behaves equivalently to the 'return' keyword in the body of a function which allows the flow of the code to exit the function and not execute the remaining code.

How do I abort the execution of a Python script?

Python

我有一个简单的Python脚本，如果满足某个条件，我想停止执行它。例如：done = Trueif done:    # quit/stop/exitelse:    # do other stuff本质上，我寻找的是与函数体中的'return‘关键字等效的东西，它允许代码流退出函数，而不执行剩余的代码。

问如何中止Python脚本的执行？
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