Most elegant way to generate 3-char sequence

[Grant Edwards]

On 2006-06-09, Rob Cowie <cowie.rob at gmail.com> wrote:
> Hi all,
>
> I wish to generate a sequence of the form 'aaa', 'aab', aac'.... 'aba',
> 'abb', 'abc' etc. all the way to 'zzz'.
>
> How would you construct a generator to acheive this?
>
> A simple, working but somewhat inelegant solution is...
>
> alpha = ['a','b','c','d'] #shortened for brevity
> alpha2 = ['a','b','c','d']
> alpha3 = ['a','b','c','d']
>
> def generator():
>   for char in alpha:
>     for char2 in alpha2:
>       for char3 in alpha3:
>         yield char + char2 + char3

Why three separate lists?  Why not

alpha = ['a','b','c','d'] #shortened for brevity

def generator():
  for char in alpha:
    for char2 in alpha:
      for char3 in alpha:
        yield char + char2 + char3

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