Le dimanche 20 août 2006 13:55, [EMAIL PROTECTED] a écrit :
> bussiere maillist:
> > i've got a very long string
> > and i wanted to convert it in binary
>
> Not much tested:
>
> _nibbles = {"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", "E":"1110", "F":"1111"}
>
> def toBase2(number):
> if number < 16:
> return "0000" + _nibbles["%X" % number]
> else:
> d1, d2 = "%X" % number
> return _nibbles[d1] + _nibbles[d2]
>
> convbin = dict((chr(i), toBase2(i)) for i in xrange(256))
>
> def binary(s):
> return "".join(convbin[c] for c in s)
>
> print binary("testing string")
>
> Surely there are ways to make it shorter (But it's fast enough).
>
Maybe this one is more elegant :
In [305]: trans = {}
In [306]: for i in range(256) :
.....: trans[chr(i)] = ''.join(i & 2**j and '1' or '0'
.....: for j in reversed(range(8)))
.....:
In [307]: trans['a']
Out[307]: '01100001'
In [308]: trans['\xee']
Out[308]: '11101110'
In [309]: print ''.join(trans[e] for e in 'test string')
0111010001100101011100110111010000100000011100110111010001110010011010010110111001100111
> Bye,
> bearophile
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Maric Michaud
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