Binary numbers

[Douglas Soares de Andrade]

Hi !

How to work with binary numbers in python ? Is there a way to print a number
in its binary form like we do with oct() or hex() ?

Im doing a project that i have to work with binaries and i tired of convert
numbers to string all the time to perform some operations.

I searched about it in many places like python.org and google, but not found
anything useful.

Thats why im asking this.

And another question... if python has not a way to do this, why i let me use
oct(), hex() and not bin() ?

Thanks for the help !

--
Douglas Soares de Andrade
http://douglasandrade.cjb.net - dsa at unilestemg.br
UnilesteMG - www.unilestemg.br
ICQ, MSN = 76277921, douglas at tuxfamily.org

[Dan Bishop]

Douglas Soares de Andrade wrote:

Hi !

How to work with binary numbers in python ? Is there a way to print a number
in its binary form like we do with oct() or hex() ?

Im doing a project that i have to work with binaries and i tired of convert
numbers to string all the time to perform some operations.

I searched about it in many places like python.org and google, but not found
anything useful.

Search for "itoa".

[Douglas Soares de Andrade]

Hi !

Pardon me, but what itoa has to do it the history ?

See ya !

Em Quarta 08 Junho 2005 00:34, Dan Bishop escreveu:

Douglas Soares de Andrade wrote:

Hi !

How to work with binary numbers in python ? Is there a way to print a
number in its binary form like we do with oct() or hex() ?

Im doing a project that i have to work with binaries and i tired of
convert numbers to string all the time to perform some operations.

I searched about it in many places like python.org and google, but not
found anything useful.

Search for "itoa".

--
Douglas Soares de Andrade
http://douglasandrade.cjb.net - dsa at unilestemg.br
UnilesteMG - www.unilestemg.br
ICQ, MSN = 76277921, douglas at tuxfamily.org

[Kent Johnson]

Douglas Soares de Andrade wrote:

Hi !

How to work with binary numbers in python ? Is there a way to print a number
in its binary form like we do with oct() or hex() ?

This is a popular topic in the Python Cookbook, maybe one of these recipes will suit you:
http://aspn.activestate.com/ASPN/Coo.../Recipe/219300
http://aspn.activestate.com/ASPN/Coo.../Recipe/111286
http://aspn.activestate.com/ASPN/Coo...n/Recipe/65212

Kent

[mensanator]

Douglas Soares de Andrade wrote:

Hi !

How to work with binary numbers in python ? Is there a way to print a number
in its binary form like we do with oct() or hex() ?

Im doing a project that i have to work with binaries and i tired of convert
numbers to string all the time to perform some operations.

I searched about it in many places like python.org and google, but not found
anything useful.

Thats why im asking this.

And another question... if python has not a way to do this, why i let me use
oct(), hex() and not bin() ?

Thanks for the help !

--
Douglas Soares de Andrade
http://douglasandrade.cjb.net - dsa at unilestemg.br
UnilesteMG - www.unilestemg.br
ICQ, MSN = 76277921, douglas at tuxfamily.org

You might want to try the GMPY module:

from gmpy import *
help(digits) Help on built-in function digits:

digits(...)
digits(x[,base]): returns Python string representing x in the
given base (2 to 36, default 10 if omitted or 0); leading '-'
present if x<0, but no leading '+' if x>=0. x must be an mpz,
or else gets coerced into one.
x = 2**32 - 1
print x 4294967295 print digits(x,2)

11111111111111111111111111111111

[Guyon Morée]

Don't know if this is what you mean, but:

Binary to decimal:

bin_num = '100001011'
int(bin_num, 2) 267
def dec2bin(dec_number): .... if dec_number == 0: return '0'
.... return (dec2bin(dec_number >> 1) + str(dec_number % 2))
.... dec2bin(267)

'0100001011'

--
Guyon Morée
gu*************@Mgmail.com
http://gumuz.looze.net

[Douglas Soares de Andrade]

Hi!

Em Quarta 08 Junho 2005 09:38, Guyon Morée escreveu:

Don't know if this is what you mean, but:

Binary to decimal:

bin_num = '100001011'
int(bin_num, 2)

267

Dont know this way of using it. Thanks for the teachings :)

See ya !

--
Douglas Soares de Andrade
http://douglasandrade.cjb.net - dsa at unilestemg.br
UnilesteMG - www.unilestemg.br
ICQ, MSN = 76277921, douglas at tuxfamily.org