如何从python操作cmd.exe，以便在cmd.exe窗口中显示输出

Question

I want to open cmd.exe using python, then send several commands sequentially to the cmd.exe and see the output in the same cmd.exe window. How can I do this? Using the following code doesn't show the output in the cmd.exe window.

proc = subprocess.Popen("cmd", creationflags=subprocess.CREATE_NEW_CONSOLE)
proc.communicate("dir\n")

Answer 1

You need to specify stdin=subprocess.PIPE, stdout=subprocess.PIPE . (Also specify stderr=subprocess.PIPE if you want to catch standard error output). Otherwise, Popen.communicate can't send input to subprocess, and can't get output.

import subprocess
proc = subprocess.Popen("cmd", stdin=subprocess.PIPE, stdout=subprocess.PIPE, creationflags=subprocess.CREATE_NEW_CONSOLE)
out, err = proc.communicate("dir\n" "cd ..\n" "dir\n")
# `Popen.communicate` returns a tuple of (standard output, standard error)
print(out)