在 python 中运行后续命令 [英] Running subsequent commands within python

问题描述

我希望能够在 python 中调用两个(或更多)命令，但我想确保第一个在第二个开始之前完成.subprocess 可以实现吗?例如:

I would like to be able to call two (or more) commands within python but I would like to make sure that the first is finished before the second starts. Is that possible with subprocess? For example:

subprocess.call("script1 input1 > out", shell=True)

当该命令完成时:

subprocess.call("script2 out>out2", shell=True)

或者有更好的方法吗?

推荐答案

对 subprocess.call 的调用会阻塞，直到命令完成.来自文档:

A call to subprocess.call blocks until the command completes. From the documentation:

等待命令完成，然后返回returncode属性.

Wait for command to complete, then return the returncode attribute.

同样等待完成的类似选项是subprocess.check_call.call 和 check_call 之间的区别在于，后者针对非零返回码引发异常，而前者针对所有情况返回返回码.

A similar option that also waits for completion is subprocess.check_call. The difference between call and check_call is that the latter raises an exception for a nonzero return code, whereas the former returns the return code for all cases.

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