integer to binary 0-padded

[Chris Angelico]

On Wed, Jun 15, 2011 at 10:29 PM, Olivier LEMAIRE
<m.olivier.lemaire at 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