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Groups > comp.lang.python > #7692

Re: integer to binary 0-padded

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On Wed, Jun 15, 2011 at 10:29 PM, Olivier LEMAIRE
<m.olivier.lemaire@gmail.com> wrote:
>    b = str(bin(number))[2:]
>    if len(b) !=size:
>        b = (size-len(b))*"0"+b

You don't need the str() there as bin() already returns a number.
Here's a relatively trivial simplification - although it does make the
code more cryptic:

b = (size*"0"+bin(number)[2:])[-size:]

After typing this up, I saw Daniel's post, which is rather better. Go
with that one for zero-filling; mine's more general though, you can
pad with other tokens.

ChrisA

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integer to binary 0-padded Olivier LEMAIRE <m.olivier.lemaire@gmail.com> - 2011-06-15 05:29 -0700
  Re: integer to binary 0-padded Daniel Rentz <daniel.rentz@gmx.de> - 2011-06-15 14:33 +0200
    Re: integer to binary 0-padded Tim Chase <python.list@tim.thechases.com> - 2011-06-15 08:13 -0500
  Re: integer to binary 0-padded Chris Angelico <rosuav@gmail.com> - 2011-06-15 22:48 +1000
  Re: integer to binary 0-padded Peter Otten <__peter__@web.de> - 2011-06-15 14:54 +0200

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