Python: Start New Command Prompt on Windows and Wait for It Finish/Exit

Python: Start new command prompt on Windows and wait for it finish/exit

Upon reading your comment to my previous answer what you need is:

os.system("start /wait cmd /c {command}")

Keep the windows command reference always at hand!

How to open a CMD window using python code

 import os
 os.system("start cmd.exe")

How to open a command prompt along with a command to run using a python script?

import subprocess

cmd = subprocess.Popen('cmd.exe /K cd /') 

#subprocess.Popen('cmd.exe /K netstat') # run cmd commands like netstat,..etc
#subprocess.Popen('cmd.exe /K python') # open cmd in  Python live interpreter mode
#subprocess.Popen('cmd.exe /K my_script.py') # run your python script

read more https://docs.python.org/3/library/subprocess.html#subprocess.Popen

Open Empty Command Prompt and Stay Open with Python

I found out a few ways to do this. Firstly, there are 2 ways of opening command prompt. One is the normal Windows Command Prompt.The other way is by opening it with python as the input. There are a few ways for both.

For Python as the input:

os.system('cmd.exe /C start "Unique_name" cmd.exe')

The "unique_name" is so that it can be closed with:

os.system('taskkill /F /IM "cmd.exe" /FI "WINDOWTITLE eq Unique_name"')

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The following also work:

os.system('cmd /C start cmd')

os.system('cmd /C start')

os.system('start cmd')

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For Windows Command Prompt:

os.startfile("C://Windows/System32/cmd.exe")

This can be closed with:

os.system("taskkill /f /im  cmd.exe")

BAT file: Open new cmd window and execute a command in there

You may already find your answer because it was some time ago you asked. But I tried to do something similar when coding ror. I wanted to run "rails server" in a new cmd window so I don't have to open a new cmd and then find my path again.

What I found out was to use the K switch like this:

start cmd /k echo Hello, World!

start before "cmd" will open the application in a new window and "/K" will execute "echo Hello, World!" after the new cmd is up.

You can also use the /C switch for something similar.

start cmd /C pause

This will then execute "pause" but close the window when the command is done. In this case after you pressed a button. I found this useful for "rails server", then when I shutdown my dev server I don't have to close the window after.

Python: Executing the windows command in windows command prompt from python script

Unless you want to open a new console window you don't need to run cmd.exe (%COMSPEC%) in order to run another Python script as a subprocess:

import sys
from subprocess import check_call

check_call([sys.executable, "C:\\examples\\xml2html.py",
            "--dir", "c:\\Temp\\abcd", "c:\\tmp\\results.xml"])

windows Command prompt vanishes after running a python script converted to .exe using pyinstaller

You could use try-except and input() function, so that when there is any error, it will wait for the user to interact.

Look at this example -

a = input('Please enter a number: ')

try:
    int(a) # Converts into a integer type

except ValueError as v:
    # This will run when it cannot be converted or if there is any error
    print(v) # Shows the error
    input() # Waits for user input before closing

For your e.g code, try this -

import sys

try:
    x = int(input("  enter a number :"))
    y = int(input("  enter a number :"))

except ValueError as v:
    print(v)
    input('Press any key to exit ')
    sys.exit()

if x>100 or y > 100 :
    try:
        sys.exit("ERROR :value out of range")

    except SystemExit as s:
        print(s)
        input('Press any key to exit ')
        sys.exit()
    
z=x+y

print(z)

You will see that the command prompt does not close immediately

wait for terminal command to finish in python

use communicate:

cmd = subprocess.Popen(command)
cmd.communicate()
# Code to be run after execution finished

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