通过打开 cmd 提示符运行命令时子进程模块不返回 output

Question

I am using subprocess module to open command prompt and run few command in it and retrive the result.

I tried below code and it is not returning any output. Simply running for a long time.Please help what is wrong with this code. Similar to this code, i used notepad application path and text file path and it opened notepad application with text file. But command prompt is not opening.

import subprocess
process = subprocess.Popen(['C:\\Windows\\system32\\cmd.exe', 'dir'], stdout=subprocess.PIPE)
stdout=process.communicate()
print(stdout)

Answer 1

The issue is that cmd.exe dir doesn't actually run the dir command. You need to specify the /c flag, per MSDN . So you really want

import subprocess
process = subprocess.Popen(['C:\\Windows\\system32\\cmd.exe', '/c', 'dir'], stdout=subprocess.PIPE)
stdout=process.communicate()
print(stdout)