CODEWITHSUNDEEP
python
Poiponen
Poiponen

Reputation: 101

Generating all letter combinations of a set of letters in Python

Which code best generates all 3-letter combinations of a given set of letters in Python? I want to output something like this: 'AAA', 'AAB', 'AAC', 'AAD', 'AAE', 'AAF', 'AAG', 'AAH', 'AAI', 'AAJ', 'AAK', 'AAL', 'AAM'...'ZZX', 'ZZY', 'ZZZ'

Upvotes: 0

Views: 120

Answers (3)

Mauxricio
Mauxricio

Reputation: 190

I think you are looking for itertools.combinations_with_replacement method

import itertools

for conv in itertools.combinations_with_replacement("abcdefg",r=3):
    print(conv)

where r is the size of every combination.

Upvotes: 0

John Coleman
John Coleman

Reputation: 52008

itertools is a natural choice since these are essentially products drawn from a set of letters.

import string,itertools

words = [''.join(letters) for letters in itertools.product(string.ascii_uppercase,repeat = 3)]

print(words[:5]) #['AAA', 'AAB', 'AAC', 'AAD', 'AAE']
print(words[-5:]) #['ZZV', 'ZZW', 'ZZX', 'ZZY', 'ZZZ']

Upvotes: 1

vegiv
vegiv

Reputation: 152

You could do it easy with for loops.

combinations = []
letters = ['A','B','C',....,'Z']
for letter1 in letters:
    code = ''
    code = code + letter1
    for letter2 in letters:
       code = code + letter2 
       for letter3 in letters:
           code = code + letter3
           combinations.append(code)

Upvotes: 0

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