Replace printed statements in Python 2.7

Question

How to replace printed statements in Python 2.7, for example:

for i in range(100):
    print i,"% Completed"

#Result Must Be:
>>> 1 % Completed

The 1 must be replaced by 2 and so on. But not in different line or append on same line.

I tried searching about it, found solution such as

from __future__ import print_function
print("i: "+str(i),end="\r")

But they result in appended print statements. Is there any correction in my print_function or is there a different solution?

Not sure what result you want. do you want every statement printed in loop in single line? — Rohit Jain, Dec 17 '15 at 15:52
I want the printed statement to be replaced by new statement, not in new lines or appended — Craziest Hacker, Dec 17 '15 at 15:53
For example, `1 % Completed` must become `2 % Completed` but not `1 % Completed 2 % Completed` — Craziest Hacker, Dec 17 '15 at 15:54
Can't you just replace `i` with `(i+1)` in the print statement? — Tom Karzes, Dec 17 '15 at 15:55
@TomKarzes I don't want multiple printed lines or statement, i want the output replaced. — Craziest Hacker, Dec 17 '15 at 15:57
Your code works **if you run the script in a shell**, as does the code in the answers below. It **will not work** in an IDE (well, probably, I can't speak for them all), and clearly doesn't in yours. — SiHa, Dec 17 '15 at 16:10

score 4 · Accepted Answer · answered Dec 17 '15 at 16:00

4

Do you want something like this:

>>> import sys, time
>>> for i in range(100):
...     time.sleep(0.1)
...     sys.stdout.write('%d %% Completed \r' % (i,))
...     sys.stdout.flush()

answered Dec 17 '15 at 16:00

Rohit Jain

203,151
43
392
509

Sorry but I want the output replaced, not appended. – Craziest Hacker Dec 17 '15 at 16:02
1

@CraziestHacker Did you run this? – Rohit Jain Dec 17 '15 at 16:02
Yes, just as you posted it – Craziest Hacker Dec 17 '15 at 16:03
@CraziestHacker I don't see it appending to previous output on my shell. Did you miss that `\r` at the end of the string? – Rohit Jain Dec 17 '15 at 16:04
@CraziestHacker: Methinks you are running the code in an IDE, rather than a shell terminal? – SiHa Dec 17 '15 at 16:06
I copied you statements, so no error in copying. My out put is as follows: `0 % Completed 1 % Completed 2 % Completed 3 % Completed 4 % Completed 5 % Completed 6 % Completed 7 % Completed 8 % Completed 9 % Completed 10 % Completed 11 % Completed 12 % Completed 13 % Completed 14 % Completed 15 % Completed 16 % Completed 17 % Completed 18 % Completed 19 % Completed 20 % Completed 21 % Completed 22 % Completed ` – Craziest Hacker Dec 17 '15 at 16:06
Yep, i only work on IDE, not on shell. – Craziest Hacker Dec 17 '15 at 16:07
Copied where? To terminal directly? Not sure how you running it. May be try typing it out by hand and see? – Rohit Jain Dec 17 '15 at 16:08
Well, it ain't gonna work then. Will your code run in a shell when it's deployed? No, it'll be run in a shell. – SiHa Dec 17 '15 at 16:08
Okay, it works on shell, but not on IDE. Thanks for your solutions though. – Craziest Hacker Dec 17 '15 at 16:10
how to change it to Completed: 100% instead of 100% Compleated – TheCrazyProfessor May 22 '17 at 17:45
FYI this didn't work (for me at least) using 'python' in the terminal (on ubuntu) but worked using 'ipython', 'python3 script.py' and in a jupyter notebook – Pink Flying Elephant Jun 02 '22 at 09:36

score 2 · Answer 2 · answered Dec 17 '15 at 15:58

2

Here you go:

from __future__ import print_function

for i in range(100):
    print('{0}% Completed\r'.format(i), end='')
print('100% Completed')

Set a higher range if you actually want to see it work for a few seconds.

answered Dec 17 '15 at 15:58

timgeb

73,231
20
109
138

Sorry but I want the output replaced, not appended. – Craziest Hacker Dec 17 '15 at 16:00
1

@CraziestHacker my code does replace the output, what are you talking about? – timgeb Dec 17 '15 at 16:03
So, your answer is irrelevant, because my question clearly states replace output statement, but not append it. – Craziest Hacker Dec 17 '15 at 16:04
@CraziestHacker the output is replaced, not appended. You are doing something wrong. – timgeb Dec 17 '15 at 16:05

Replace printed statements in Python 2.7

2 Answers2

Linked