1樓：黃哥
先看help 文件
exit([status])
Exit the interpreter by raising SystemExit(status).
If the status is omitted or None, it defaults to zero (i.e., success).
If the status is an integer, it will be used as the system exit status.
If it is another kind of object, it will be printed and the system
exit status will be one (i.e., failure).
exit() 不傳引數時，預設傳0
exit() 引數為整數，it will be used as the system exit status。
sys.exit(-1)tells the program to quit. It basically just stops the python code from continuing execution.
-1 is just the status code that is passed in. Generally 0 denotes successful execution, any other number (usually 1) means something broke.
The callsys.exit(n)tells the interpreter to stop the execution and returnnto the OS. What this value is depends on the operating system.
For example on UNIX ($?is the last exit status):
I want to know what exactly sys.exit(-1) returns in python?
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