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Groups > comp.lang.python > #27473

Re: How to convert base 10 to base 2?

References <1cedbf80-117b-48aa-a9f2-754293203408@googlegroups.com>
Date 2012-08-20 01:04 -0700
Subject Re: How to convert base 10 to base 2?
From Benjamin Kaplan <benjamin.kaplan@case.edu>
Newsgroups comp.lang.python
Message-ID <mailman.3544.1345449933.4697.python-list@python.org> (permalink)

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On Mon, Aug 20, 2012 at 12:50 AM,  <gianpycea@gmail.com> wrote:
> Hi,
> as you can argue from the subject, i'm really,really new to python.
> What is the best way to achieve that with python? Because the syntax int('30',2) doesn't seem to work!

That syntax goes the other way- from a string representing a number in
the given base into an integer (which doesn't have a base, although
it's stored in base 2).

You get the binary by doing bin(x), where x is an integer.

>>> bin(12)
'0b1100'

If you want to go from a string in base-10 to a string in base-2, you
have to do the conversion to integer first.

>>> bin(int('5',10))
'0b101'

Although you don't need to specify the 10 because that's the default.
>>> bin(int('5'))
'0b101'

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Thread

How to convert base 10 to base 2? gianpycea@gmail.com - 2012-08-20 00:50 -0700
  Re: How to convert base 10 to base 2? Benjamin Kaplan <benjamin.kaplan@case.edu> - 2012-08-20 01:04 -0700
    Re: How to convert base 10 to base 2? Miki Tebeka <miki.tebeka@gmail.com> - 2012-08-21 09:23 -0700
    Re: How to convert base 10 to base 2? Miki Tebeka <miki.tebeka@gmail.com> - 2012-08-21 09:23 -0700
  Re: How to convert base 10 to base 2? Mark Lawrence <breamoreboy@yahoo.co.uk> - 2012-08-20 09:10 +0100
  Re: How to convert base 10 to base 2? lipska the kat <lipskathekat@yahoo.co.uk> - 2012-08-20 09:26 +0100
  Re: How to convert base 10 to base 2? gianpycea@gmail.com - 2012-08-20 01:57 -0700
    Re: How to convert base 10 to base 2? Jean-Michel Pichavant <jeanmichel@sequans.com> - 2012-08-20 16:52 +0200
    Re: How to convert base 10 to base 2? Dennis Lee Bieber <wlfraed@ix.netcom.com> - 2012-08-20 13:29 -0400
    Re: How to convert base 10 to base 2? Joel Goldstick <joel.goldstick@gmail.com> - 2012-08-20 13:57 -0400
    Re: How to convert base 10 to base 2? Ian Kelly <ian.g.kelly@gmail.com> - 2012-08-20 12:00 -0600
      Re: How to convert base 10 to base 2? Paul Rubin <no.email@nospam.invalid> - 2012-08-20 21:05 -0700
    Re: How to convert base 10 to base 2? Ian Kelly <ian.g.kelly@gmail.com> - 2012-08-20 12:10 -0600

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