Python - Infinite while loop, break on user input

Question

I have an infinite while loop that I want to break out of when the user presses a key. Usually I use raw_input to get the user's response; however, I need raw_input to not wait for the response. I want something like this:

print 'Press enter to continue.'
while True:
    # Do stuff
    #
    # User pressed enter, break out of loop

This should be a simple, but I can't seem to figure it out. I'm leaning towards a solution using threading, but I would rather not have to do that. How can I accomplish this?

Answer 1

I could not get some of the popular answers working. So I came up with another approach using the CTRL + C to plug in user input and imbibe a keyboard interrupt. A simple solution can be using a try-catch block,

i = 0
try:
    while True:
        i+=1
        print(i)
        sleep(1)
except:
    pass
# do what you want to do after it...

I got this idea from running a number of servers like flask and django. This might be slightly different from what the OP asked, but it might help someone else who wanted a similar thing.

Answer 2

I think you can do better with msvcrt:

import msvcrt, time
i = 0
while True:
    i = i + 1
    if msvcrt.kbhit():
        if msvcrt.getwche() == '\r':
            break
    time.sleep(0.1)
print(i)

Sadly, still windows-specific.