Python timer not working in real time

Question

I am writing a countdown in python but it doesn't work.

for countdown in 10, 9, 8, 7, 6, 5, 4, 3, 2, 1, quit():
    print (countdown)

That's the code. The countdown just zooms by and quits the program. Is there a way to make the countdown comply to real time and countdown and quit in 10 seconds. Not immediately.

related: http://stackoverflow.com/questions/230751/how-to-flush-output-of-python-print — NightShadeQueen, Jul 08 '15 at 01:01
Maybe I'm just stupid, but I don't see any timer at all. Just a regular full-speed-ahead for loop. — Nathan Tuggy, Jul 08 '15 at 01:04
@Pythonist, what led you to believe that some kind of delay would occur? Or are you just asking us to create a timer for you? — TigerhawkT3, Jul 08 '15 at 01:11

NightShadeQueen · Answer 1 · 2015-07-08T01:15:44.317

1

tl;dr python buffers print, and python isn't that slow

import sys, time
for countdown in range(10,1,-1):
    print(countdown)
    sys.stdout.flush() #flushes buffer
    time.sleep(1) #sleep for one second, otherwise loop goes very quickly
print(0)
sys.stdout.flush()
# no quit needed. Program will end when file ends

edited Jul 08 '15 at 01:15

answered Jul 08 '15 at 01:04

NightShadeQueen

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Why are you iterating an iterable containing `quit()` within? – Malik Brahimi Jul 08 '15 at 01:13
1

Uh, my lack of excuse is "I didn't realize that was a builtin and thought that it was some random function OP had for garbage collection" :P – NightShadeQueen Jul 08 '15 at 01:17

score 1 · Accepted Answer · answered Jul 08 '15 at 01:04

1

You need to tell it to wait otherwise it will run the code as fast as your processor can do it.

from time import sleep
for countdown in range(10,0,-1):
  print(countdown)
  sleep(1)

answered Jul 08 '15 at 01:04

markzz

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Python timer not working in real time

2 Answers2