4.5 `pass` 语句 `pass` Statements

The pass statement does nothing. It can be used when a statement is required syntactically but the program requires no action. For example:

pass 语句什么也不做。它用于那些语法上必须要有什么语句，但程序什么也不做的场合，例如：

>>> while True:
...       pass # Busy-wait for keyboard interrupt
...

4.5 pass 语句 pass Statements