将我的 shell 脚本的 output 存储在变量中

Question

Using the following code:

import subprocess
while(1==1):
    command_terminal= input('Enter the command you would like to pass: ') 
    command_terminal=command_terminal.split()
    result=subprocess.run(command_terminal, stdout=subprocess.PIPE)  
    result=result.stdout.decode('utf-8')
    print(result)

Basically I am trying to emulate terminal as a whole. But I am sort of failing. Stuff like ps -A Doesn't give an output at all. Any help..?

Answer 1

Use subprocess.check_output . The encoding argument convert the output bytes to str .

import subprocess

while (1 == 1):
    command_terminal = input('Enter the command you would like to pass: ')
    command_terminal = command_terminal.split()
    result = subprocess.check_output(command_terminal, encoding='utf-8')
    print(result)

Note that CalledProcessError is raise if the exit code is not zero.

Alternatively, subprocess.run with capture_output=True may be used. The output is stored in the returned CompletedProcess.stdout and no exception whatever the exit code is.

import subprocess

while (1 == 1):
    command_terminal = input('Enter the command you would like to pass: ')
    command_terminal = command_terminal.split()
    completed = subprocess.run(command_terminal, encoding='utf-8', capture_output=True)
    result = completed.stdout
    print(result)

Answer 2

I actually did what you did and hosted it over on github ( https://github.com/Pythers/PyCMD/blob/master/ main .py )

I believe your problem is that you need to set the stdout to the normal instead of subprocess.PIPE

import sys
import subprocess
while 1==1:
    command_terminal= input('Enter the command you would like to pass: ')
    command_terminal=command_terminal.split()
    result=subprocess.run(command_terminal, stdout=sys.stdout)