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斜线从分处理中读起。 开放
原标题:Can t read stderr from subprocess.Popen

我想开始一个儿童进程,读到它的梯子,但迄今为止,我可以看一看所有使用分处理的方法。 开放,甚至 st。 I m试图使用分处理法。 这是我做的:

import subprocess
p = subprocess.Popen( ls )
s = p.communicate()
print s

这给我带来了产出(None, 无)。 我认为,奶粉是 st和 st。 情况如何? 不管怎么说,我如何能够从一个从分处理开始的进程中看到 st和 st。 开放吗?

最佳回答

你们需要具体说明 st子处理。 PIPE和Progder=分处理。 PIPE 在你创建时 反对:

  p = subprocess.Popen( ls , stdout=subprocess.PIPE, stderr=subprocess.PIPE)
问题回答

来源:

Popen.communicate(input=None) 

3. 与进程互动: 将数据附在后面。 阅读中流和中流层的数据,直至完成档案。 放弃程序终止。 任择性投入论点应当是向儿童进程发出指示,或者,如果不向儿童发送数据,则无。

www.un.org/Depts/DGACM/index_spanish.htm 请注意,如果你想向这一过程的主线发送数据,那么你就有必要以<代码>stdin=PIPE创建开放物体。 同样,为了获得结果图中除<代码>None以外的任何东西,你需要stdout=PIPE和/或stderr=PIPE





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