Test if a alphabet have a unique encoding using the "test for unique decodability".

test_unique_encoding.py

codewords = {'0', '01', '10', '1'} 

def isprefix(string_1: str, string_2: str) -> bool:

    return string_1 == string_2[:len(string_1)]

dangling_codewords = set()

for word1 in codewords:
    for word2 in codewords:

        if word1 == word2:
            continue

        if isprefix(word1, word2):

            dangling_codewords.add(word2[len(word1):])

print(dangling_codewords)