给定多个变量的所有可能列表的python列表

Question

say i have a ['xyz'] . I want all possible lists given that x, y, and z can take the values of 'a' and 'b'. so the result will be [aaa], [aab], [aba], [abb], [baa], [bab], [bba], [bbb] . I want to do this without first knowing how many unknown variables or possible values there will be.

is there an elegant and simple way of doing this?

the end result should return a list of lists:

[[aaa], [aab], [aba], [abb], [baa], [bab], [bba], [bbb]]

Answer 1

You can use itertools.product for that, and use .join to transform the tuples it generates to strings.

import itertools

[ ''.join(x) for x in itertools.product(['a','b'],repeat=3) ]

['aaa', 'aab', 'aba', 'abb', 'baa', 'bab', 'bba', 'bbb']