Python: simple CLI GUI

Question

A simple question on a python module. Let's say I have the following code:

for i in range(1000):
  print i

It'll output something along the lines of:

1

2

'Snip'

999

Is it possible to have the program output all the numbers on the same line? I'm not talking about "1, 2, 3 .." rather I want the line value to change to the current i

ewall · Accepted Answer · 2010-02-10 18:58:09Z

3

If you want the character to be overwritten/replaced each time, you may need to use a terminal control library like 'curses'. Here's a Python how-to article to get you started.

answered Feb 10, 2010 at 18:58

ewall

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Max Shawabkeh · Accepted Answer · 2010-02-10 18:58:01Z

3

If you want to draw a GUI inside a terminal, you'll have to use the curses module.

answered Feb 10, 2010 at 18:58

Max Shawabkeh

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SilentGhost · Accepted Answer · 2010-02-10 18:58:37Z

2

For a simple case the following code works just fine:

sys.stdout.write(str(i)+'\r')
sys.stdout.flush()

answered Feb 10, 2010 at 18:58

SilentGhost

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3 Comments

Steven Over a year ago

Don't forget to add padding to the right, to overwrite characters that are not overwritten by the following output. The last output from the example would read "999p" because "999" doesn't overwrite the "p" from "snip".

SilentGhost Over a year ago

@Steven: For a simple case...

Steven Over a year ago

you're right, of course. I just mentioned it because it wouldn't work with the example output as given in the question. And now I realize that 'Snip' wasn't actually meant as an example output ;-)

Mike Sherov · Accepted Answer · 2010-02-10 18:59:01Z

2

import os

for i in range(1000):
  print i
  os.system("clear")

edit: as mentioned in the comment below, change "clear" to "cls" if using windows.

answered Feb 10, 2010 at 18:59

Mike Sherov

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2 Comments

Max Shawabkeh Over a year ago

This won't work on Windows, since the UNIX clear utility is called cls there.

Mike Sherov Over a year ago

I left it out initially because I assumed UNIX. Thanks for pointing it out.

VMDX · Accepted Answer · 2010-02-10 19:03:19Z

1

Text printed to stdout can't be dynamically changed. You need to use a panel.

http://docs.python.org/library/curses.panel.html

Initialize a new panel, and then use Panel.set_userptr(obj) in your loop.

answered Feb 10, 2010 at 19:03

VMDX

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