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From: Peter Otten <__peter__@web.de>
Subject: Re: Insert comma in number?
Date: Thu, 07 Mar 2013 08:55:43 +0100
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Xref: csiph.com comp.lang.python:40716

eli m wrote:

> I have a python program that accepts input and calculates the factorial of
> that number, and i want to know if i can make it so commas get inserted in
> the number. For example: instead of 1000 it would say 1,000

Last not least there's the option to employ locale-aware formatting:

>>> import locale
>>> locale.setlocale(locale.LC_ALL, "en_US.UTF-8")
'en_US.UTF-8'
>>> locale.format("%d", 12345, grouping=True)
'12,345'

In German usage of "." and "," is reversed, so:
 
>>> locale.setlocale(locale.LC_ALL, "de_DE.UTF-8")
'de_DE.UTF-8'
>>> locale.format("%d", 12345, grouping=True)
'12.345'