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Re: [newbie] String to binary conversion

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From Emile van Sebille <emile@fenx.com>
Subject Re: [newbie] String to binary conversion
Date Mon, 06 Aug 2012 15:45:50 -0700
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On 8/6/2012 1:46 PM Mok-Kong Shen said...
>
> If I have a string "abcd" then, with 8-bit encoding of each character,
> there is a corresponding 32-bit binary integer. How could I best
> obtain that integer and from that integer backwards again obtain the
> original string? Thanks in advance.

It's easy to write one:

def str2val(str,_val=0):
     if len(str)>1: return str2val(str[1:],256*_val+ord(str[0]))
     return 256*_val+ord(str[0])


def val2str(val,_str=""):
     if val>256: return val2str(int(val/256),_str)+chr(val%256)
     return _str+chr(val)


print str2val("abcd")
print val2str(str2val("abcd"))
print val2str(str2val("good"))
print val2str(str2val("longer"))
print val2str(str2val("verymuchlonger"))

Flavor to taste.

Emile

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[newbie] String to binary conversion Mok-Kong Shen <mok-kong.shen@t-online.de> - 2012-08-06 22:46 +0200
  Re: [newbie] String to binary conversion Tobiah <toby@tobiah.org> - 2012-08-06 13:59 -0700
    Re: [newbie] String to binary conversion Tobiah <toby@tobiah.org> - 2012-08-06 14:01 -0700
    Re: [newbie] String to binary conversion Mok-Kong Shen <mok-kong.shen@t-online.de> - 2012-08-06 23:33 +0200
  Re: [newbie] String to binary conversion MRAB <python@mrabarnett.plus.com> - 2012-08-06 22:56 +0100
  Re: [newbie] String to binary conversion Emile van Sebille <emile@fenx.com> - 2012-08-06 15:45 -0700
  Re: [newbie] String to binary conversion Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2012-08-07 02:01 +0000
    Re: [newbie] String to binary conversion 88888 Dihedral <dihedral88888@googlemail.com> - 2012-08-07 13:17 -0700

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