在 Python (Windows) 中与子进程的持续交互

Question

我正在从 python 的新 PowerShell 窗口中启动一个脚本，我想让该进程在后台运行，这样我就可以不断地与之交互。

我已尝试使用以下代码：

p = subprocess.Popen(['start powershell.exe', '-File', 'script.ps1']
                    shell    = True,
                    stdin    = subprocess.PIPE,
                    stdout   = subprocess.PIPE,
                    bufsize  = 1,
                    encoding ='utf-8')

p.stdin.write('input1')
p.stdout.readline()
p.stdin.write('input2')
p.stdout.readline()
p.stdin.write('input3')
p.stdout.readline()

但是 p.stdin.write 什么都不做。 我该如何解决这个问题？

Answer 1

我创建了一个最小的示例来准确了解您想要什么。从这里告诉我你想要什么？

test.py

import subprocess, sys, os

p = subprocess.Popen(['start', 'powershell.exe', '-File', 'H:\Coding\stack\script.ps1'],
                    shell=True,
                    stdout = subprocess.PIPE,
                    stdin = subprocess.PIPE,
                    bufsize = 1,
                    encoding ='utf-8'
                    )

while p.poll() is None:
    output = p.stdout.readline()
    print(output)

print('end of python'))

script.ps1

$input = Read-Host -Prompt 'input'
Write-Host $input
$input = Read-Host -Prompt 'input'
Write-Host $input
$input = Read-Host -Prompt 'input'
Write-Host $input
Write-Host 'end of process'

Write-Host -NoNewLine 'Press any key to continue...';
$null = $Host.UI.RawUI.ReadKey('NoEcho,IncludeKeyDown');

结果

PS H:\Coding\stack> python test.py
(new window started)
input: test
test
input: this
this
input: out
out
end of process
Press any key to continue...
(window closed)
end of python