detect_changes_in_a_word.py

def testWord(word, word_new):
    isGreater = len(word_new) > len(word) + 1
    isLower = len(word_new) < len(word) - 1

    if isGreater or isLower:
        return False

    if len(word_new) > len(word):
        length = len(word_new)
    else:
        length = len(word)


    i_word = 0
    i_word_new = 0
    mismatch = 0

    if len(word) == len(word_new):
        while i_word < len(word):
            if mismatch > 1:
                return False 

            if word[i_word] != word_new[i_word]:
                mismatch += 1
            
            i_word += 1

    elif len(word_new) > len(word):
        while i_word_new < len(word_new):
            if mismatch > 1:
                return False
            
            if i_word_new > len(word) - 1:
                break

            if word[i_word] != word_new[i_word_new]:
                mismatch += 1
                i_word_new += 1
                continue
            
            i_word += 1
            i_word_new += 1
    else:
        while i_word < len(word):
            if mismatch > 1:
                return False

            if i_word > len(word_new) - 1:
                break

            #print("---", word[i_word], word_new[i_word_new], mismatch)
            if word[i_word] != word_new[i_word_new]:
                mismatch += 1
                i_word += 1
                continue
            
            i_word += 1
            i_word_new += 1
        

    if mismatch > 1:
        return False
    else:
        return True


comp = [
    ["pale", "ple"],
    ["pales", "pale"],
    ["pale", "bale"],
    ["ssss", "pssss"],
    ["pssss", "ssss"],
    ["spsss", "psss"],
    ["pale", "bae"],
    ["pale", "palade"],
    ["pato", "ptos"],
    ["pato", "proto"]
]

for c in comp:
   print(testWord(c[0], c[1]))

#print(testWord("patos", "ptos"))