Replace print statement output in Python 3.7

Question

I need to make a timer, that replaces the output. For example:

5

This then replaces with 4 after one second and so on.

This no longer works:

Replace printed statements in Python 2.7

I have made a timer already as follows, but it doesn't do what I expected:

from time import sleep
for i in range(4, -1, -1):
    print(i, end=" ")
    sleep(1)

The actual results are:

4 3 2 1 0

I'm using maCOS.

Use `print("\033c", end="")`to clear terminal and then execute your timer function. — Abhyudai, Oct 06 '19 at 11:01
you cannot clear the terminal in your IDE, you need to run in terminal to see the effects* — Charif DZ, Oct 06 '19 at 11:21
Try `end='\r'` (carriage return). It should return to the beginning of the line wihout a linefeed, but this is terminal-dependent. — Mark Tolonen, Oct 06 '19 at 21:06

norok2 · Accepted Answer · 2019-10-07T07:44:29.847

2

What about using the DEL ASCII character?

import time


for i in range(4, -1,-1):
    s = str(i)
    print(i, end='', flush=True)
    time.sleep(1)
    print('\u0008' * len(s), end='', flush=True)
print()

edited Oct 07 '19 at 07:44

answered Oct 06 '19 at 21:23

norok2

25,683
4
73
99

score 0 · Answer 2 · answered Oct 06 '19 at 20:50

0

For Mac or Linux you can use print('\033c', end='') to clear the terminal. So your code should look like:

from time import sleep:

for i in range(4, -1,-1):
    print(i)
    print('\033c', end='')
    sleep(1)

answered Oct 06 '19 at 20:50

Abhyudai

826
7
16

Replace print statement output in Python 3.7

2 Answers2