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Date: Tue, 07 Jun 2011 15:04:35 -0700
From: Ethan Furman <ethan@stoneleaf.us>
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To: Friedrich Clausen <fred@derf.nl>
Subject: Re: Dynamic Zero Padding.
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Xref: x330-a1.tempe.blueboxinc.net comp.lang.python:7193

Friedrich Clausen wrote:
> Hello All,
> 
> I want to print some integers in a zero padded fashion, eg. :
> 
>>>> print("Testing %04i" % 1)
> Testing 0001
> 
> but the padding needs to be dynamic eg. sometimes %05i, %02i or some
> other padding amount. But I can't insert a variable into the format
> specification to achieve the desirable padding.
> 
> I would be much obliged if someone can give me some tips on how to
> achieve a variably pad a number.

--> width = 3
--> print("Testing %0*i" % (width, 1))
Testing 001
--> width = 7
--> print("Testing %0*i" % (width, 1))
Testing 0000001

The '*' acts as a place holder for the width argument.

~Ethan~