If the restart flag is set to True (the default), then an interrupt to the routine caused from some UNIX signal will cause a restart of the routine.
如果restart标志设置为True(默认设置)，那么在某些UNIX信号造成中断时，会重新启动例程。
If the flag is set it indicates that a fast interrupt was serviced and therefore only the program counter is unstacked.
如果该标志被设置指示快速的中断服务是与因此，只有程序计数器拆散。
If the flag is set it indicates that a fast interrupt was serviced and therefore only the program counter is unstacked.
如果该标志被设置指示快速的中断服务是与因此，只有程序计数器拆散。
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