How To Use Subprocess.Popen With Built-in Command On Windows

In my old python script, I use the following code to show the result for Windows cmd command: print(os.popen('dir c:\\').read()) As the python 2.7 document said os.popen is obsole

Solution 1:

You should use call subprocess.Popen with shell=True as below:

import subprocess

result = subprocess.Popen("dir c:", shell=True,
                          stdout=subprocess.PIPE, stderr=subprocess.PIPE)

output,error = result.communicate()

print (output)

More info on subprocess module.

Solution 2:

This works in Python 3.7:

from subprocess import Popen, PIPE

args = ["echo", "realtime abc"]
p = Popen(args, stdout=PIPE, stderr=PIPE, shell=True, text=True)

for line in p.stdout:
    print("O=:", line)

.

Output:

O=: "realtime abc"