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Groups > comp.lang.python > #27513
| From | Dennis Lee Bieber <wlfraed@ix.netcom.com> |
|---|---|
| Subject | Re: How to convert base 10 to base 2? |
| Date | 2012-08-20 13:29 -0400 |
| Organization | > Bestiaria Support Staff < |
| References | <1cedbf80-117b-48aa-a9f2-754293203408@googlegroups.com> <28b3f583-fad1-46da-a6b5-933f966eb401@googlegroups.com> <50324F3A.7040001@sequans.com> |
| Newsgroups | comp.lang.python |
| Message-ID | <mailman.3569.1345483790.4697.python-list@python.org> (permalink) |
On Mon, 20 Aug 2012 16:52:42 +0200, Jean-Michel Pichavant
<jeanmichel@sequans.com> declaimed the following in
gmane.comp.python.general:
> note that the builtin bin function is not available with python ver < 2.6
>
> def Denary2Binary(n):
> '''convert denary integer n to binary string bStr'''
> bStr = ''
> if n < 0: raise ValueError, "must be a positive integer"
> if n == 0: return '0'
> while n > 0:
> bStr = str(n % 2) + bStr
> n = n >> 1
> return bStr
>
> JM
>
> (not my function but I can't remember who I stole from)
I think I typically have done this by going through a hex
representation.
H2B_Lookup = { "0" : "0000", "1" : "0001",
"2" : "0010", "3" : "0011",
"4" : "0100", "5" : "0101",
"6" : "0110", "7" : "0111",
"8" : "1000", "9" : "1001",
"A" : "1010", "B" : "1011",
"C" : "1100", "D" : "1101",
"D" : "1110", "F" : "1111" }
def I2B(i):
sgn = " "
if i < 0:
sgn = "-"
i = -i
h = ("%X" % i)
return sgn + "".join([H2B_Lookup[c] for c in h])
>>> from i2b import I2B
>>> I2B(10)
' 1010'
>>> I2B(1238)
' 010011100110'
>>> I2B(-6)
'-0110'
>>>
--
Wulfraed Dennis Lee Bieber AF6VN
wlfraed@ix.netcom.com HTTP://wlfraed.home.netcom.com/
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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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