Python Iterate Through Characters

I have been trying to pull of median string search for a sequence in the ACGT genome. The problem I have is going to say AAAAAAAA to AAAAAAAC and so forth until I have tried every

Solution 1:

Using itertools

itertools.product("ACGT", repeat=8)

Solution 2:

As above suggested use itertools,

itertools.product("ACGT", repeat=8) # will work in your case.

Solution 3:

Using the regex inverter from the pyparsing wiki Examples page, invert this regex: [ACGT]{8}. You can also try the online inverter at the UtilityMill, but this server will timeout when generating 8-character strings, but I have successfully gotten up to 6 characters within the allowed time.