Loop from 'aaaa' to 'tttt' ?

[rzed]

Lars Schaps wrote:
> Hello.
>
> In my program in need a loop from 'aaaa' over
> 'aaac', 'aaag', 'aaat', 'aaca' to 'tttt'.
> (Possible characters 'a', 'c', 'g' and 't')
>
> One idea i had is to take a number n with the base of
> 4 and use
>
> t= string.translate( '0123', 'acgt')
> string.translate( n, t)
>
> But i don't know how to convert from base10 to base4.
>
> Has anyone a idea?
>

I'm not sure if this is at like what you had in mind, but:

ltrs = 'acgt'

for a in ltrs:
    for c in ltrs:
        for g in ltrs:
            for t in ltrs:
                print  '%s%s%s%s' % (a,c,g,t)

--
rzed