CODEWITHSUNDEEP
pythonwindowscmdcommand-line
Bernd
Bernd

Reputation:

How to pause a script when it ends on Windows?

I am running command-line Python scripts from the Windows taskbar by having a shortcut pointing to the Python interpreter with the actual script as a parameter.

After the script has been processed, the interpreter terminates and the output window is closed which makes it impossible to read script output.

What is the most straightforward way to keep the interpreter window open until any key is pressed?

In batch files, one can end the script with pause. The closest thing to this I found in python is raw_input() which is sub-optimal because it requires pressing the return key (instead of any key).

Upvotes: 57

Views: 133085

Answers (13)

dF.
dF.

Reputation: 75785

On Windows you can use the msvcrt module.

  • msvcrt.kbhit()
    Return True if a keypress is waiting to be read.

  • msvcrt.getch()
    Read a keypress and return the resulting character as a byte string. Nothing is echoed to the console. This call will block if a keypress is not already available, but will not wait for Enter to be pressed. If the pressed key was a special function key, this will return '\000' or '\xe0'; the next call will return the keycode. The Control-C keypress cannot be read with this function.

If you want it to also work on Unix-like systems you can try this solution using the termios and fcntl modules.

Upvotes: 5

Radim Akudo
Radim Akudo

Reputation: 25

On Windows 10 insert at beggining this:

#!/usr/bin/env python
# -*- coding: utf-8 -*-

Strange, but it works for me! (Together with input() at the end, of course)

Upvotes: 1

Thinking Monkey
Thinking Monkey

Reputation: 41

As to the "problem" of what key to press to close it, I (and thousands of others, I'm sure) simply use input("Press Enter to close").

Upvotes: 3

Vincenzo
Vincenzo

Reputation: 67

There's a simple way to do this, you can use keyboard module's wait function. For example, you can do: 

import keyboard
print("things before the pause")
keyboard.wait("esc") # esc is just an example, you can obviously put every key you want
print("things after the pause")

Upvotes: 2

NGUYEN Q.Yen
NGUYEN Q.Yen

Reputation: 449

Try os.system("pause") — I used it and it worked for me.

Make sure to include import os at the top of your script.

Upvotes: 44

merfman
merfman

Reputation: 11

If you type 

input("")

It will wait for them to press any button then it will continue. Also you can put text between the quotes.

Upvotes: 0

KingMak
KingMak

Reputation: 1478

The best option: os.system('pause') <-- this will actually display a message saying 'press any key to continue' whereas adding just raw_input('') will print no message, just the cursor will be available.

not related to answer:

os.system("some cmd command") is a really great command as the command can execute any batch file/cmd commands.

Upvotes: 13

regan
regan

Reputation: 751

One way is to leave a raw_input() at the end so the script waits for you to press Enter before it terminates.

Upvotes: 59

SingleNegationElimination
SingleNegationElimination

Reputation: 156158

Getting python to read a single character from the terminal in an unbuffered manner is a little bit tricky, but here's a recipe that'll do it:

Recipe 134892: getch()-like unbuffered character reading from stdin on both Windows and Unix (Python)

Upvotes: 1

lprsd
lprsd

Reputation: 87095

import pdb
pdb.debug()

This is used to debug the script. Should be useful to break also.

Upvotes: 0

Boris Gorelik
Boris Gorelik

Reputation: 31767

One way is to leave a raw_input() at the end so the script waits for you to press enter before it terminates.

The advantage of using raw_input() instead of msvcrt.* stuff is that the former is a part of standard Python (i.e. absolutely cross-platform). This also means that the script window will be alive after double-clicking on the script file icon, without the need to do 

cmd /K python <script>

Upvotes: 7

Сыч
Сыч

Reputation: 929

An external WConio module can help here: http://newcenturycomputers.net/projects/wconio.html

import WConio
WConio.getch()

Upvotes: 0

David Grant
David Grant

Reputation: 14223

There's no need to wait for input before closing, just change your command like so:

cmd /K python <script>

The /K switch will execute the command that follows, but leave the command interpreter window open, in contrast to /C, which executes and then closes.

Upvotes: 16

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