Supreme python question

[4.046]

code = ''.join(random.choice(string.ascii_lowercase + string.digits) for k in range(12))

i want to include only a-f   character in lowercase above, i dont want a-z
what to do 

codes are mixed of numbers and lowercase letters but in lowercase too it only has a-f

 

 

[16]

Make a list and add the letters you want to the list then do random.choice(listname) <- I think thats how it goes.

[203]

use regex ?