在Shell上提示时如何使python脚本按'enter' [英] How to make python script press 'enter' when prompted on Shell

问题描述

我要自动升级程序.

我在Python中运行以下代码:

I run in Python this code:

import subprocess
subprocess.call('./upgrade')

执行此操作时，我从外壳程序获得输出，表明升级过程已成功启动，然后出现按Enter继续"的信息.我将如何自动执行此过程，以便在提示时python脚本自动按"回车?我需要在程序执行两次. 我需要在Linux而不是Windows上完成此操作，因为在这里被问到: 生成键盘事件 另外，需要在Shell提示输入Enter之后专门执行此操作. 谢谢你的帮助. 我在这里找不到解决方案: 按Enter作为命令输入

When I do this, I get output from shell that Upgrade procedure started successfully, and then I get 'Press Enter to continue'. How would I automatize this process, so that python script automatically "presses" enter when promted? I need this to be done twice during procedure. I need this to be done on Linux, not Windows, as it was asked here: Generate keyboard events Also, this needs to be done specifically after Shell prompts for Enter. Thanks for any help. I did not find solution here: Press enter as command input

推荐答案

您可以使用subprocess.Popen和subprocess.communicate将输入发送到另一个程序.

You can use subprocess.Popen and subprocess.communicate to send input to another program.

例如，将"enter"键发送到以下程序test_enter.py:

For example, to send "enter" key to the following program test_enter.py:

print "press enter..."
raw_input()
print "yay!"

您可以执行以下操作:

from subprocess import Popen, PIPE
p = Popen(['python test_enter.py'], stdin=PIPE, shell=True)
p.communicate(input='\n')

您可能会找到的答案python子进程的"stdin" 也很有帮助.

You may find answer to "how do i write to a python subprocess' stdin" helpful as well.

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