While timer in Python

Question

How to make a timer in while? I would like to run a while, and do something, e.g. a

print "hello" 

run print "hello" for 1 hour for example.

Answer 1

You can do it like this:

import time

end_time = time.time() + 10
countTimer = 0
sleepTime = 0.500
while time.time() < end_time:
    time.sleep(sleepTime)
    countTimer += sleepTime
    print('hello, ja passaram {} secs'.format(countTimer))

Change the 10 by 3600 for a 1hour. You can remove the Sleep, but the program will get very heavy