CODEWITHSUNDEEP
pythonpython-2.7
Michael
Michael

Reputation: 721

Printing on the same line with time.sleep()

I'm trying to print two strings on the same line using a timer in between. Here's the code:

import time

print "hello",
time.sleep(2)
print "world"

But it seems the program waits for two seconds then prints both strings.

Upvotes: 3

Views: 4843

Answers (2)

iLoveTux
iLoveTux

Reputation: 3625

in python 2.7 you could use the print_function from the future package

from __future__ import print_function
from time import sleep

print("hello, ", end="")
sleep(2)
print("world!")

But like you said, this waits 2 seconds then prints both strings. In light of Gui Rava's answer you can flush stdout, here is a sample which should get you in the right direction:

import time
import sys

def _print(string):
    sys.stdout.write(string)
    sys.stdout.flush()

_print('hello ')
time.sleep(2)
_print('world')

Upvotes: 5

Gui Rava
Gui Rava

Reputation: 448

The issue is that , by default, the console output is buffered. Since Python 3.3 print() supports the keyword argument flush (see documentation):

print('hello', flush=True)

If you use an prior versionf of python, you can force a flush like this:

import sys
sys.stdout.flush()

Upvotes: 10

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