diff --git a/solutions/python/pig-latin/10/pig_latin.py b/solutions/python/pig-latin/10/pig_latin.py new file mode 100644 index 0000000..376e4b6 --- /dev/null +++ b/solutions/python/pig-latin/10/pig_latin.py @@ -0,0 +1,133 @@ +""" +The task is to translate text from English to Pig Latin. +The translation is defined using four rules, which look at the pattern of vowels +and consonants at the beginning of a word. These rules look at each word's use +of vowels and consonants: + +vowels: the letters a, e, i, o, and u +consonants: the other 21 letters of the English alphabet +""" + + +def translate(text: str) -> str: + """ + Translate English text to Pig Latin. + + :param text: The English text to translate + :return: The text translated to Pig Latin + """ + words: list[str] = text.split(" ") + return " ".join(process_words(word) for word in words) + + +def process_words(text: str) -> str: + """ + Process a single word and convert it to Pig Latin using the four translation rules. + + :param text: The English word to convert + :return: The word converted to Pig Latin + """ + if not text: + return "" + + # Rule 1 + if is_vowel(text[0]) or text[:2] in ("xr", "yt"): + # If a word begins with a vowel, + # or starts with "xr" or "yt", + # add an "ay" sound to the end of the word. + return f"{text}ay" + + # Rule 3 + if is_rule_3(text): + # If a word starts with zero or more consonants followed by "qu", first move + # those consonants (if any) and the "qu" part to the end of the word, and then + # add an "ay" sound to the end of the word. + i = text.index("qu") + return f"{text[i + 2:]}{text[: i + 2]}ay" + + # Rule 4 + if is_rule_4(text): + # If a word starts with one or more consonants followed by "y", first move the + # consonants preceding the "y" to the end of the word, and then add an "ay" sound + # to the end of the word. + i = text.index("y") + return f"{text[i:]}{text[:i]}ay" + + # Rule 2 + if is_consonant(text[0]): + # If a word begins with one or more consonants, first move those consonants + # to the end of the word and then add an "ay" sound to the end of the word. + i = get_consonant_cluster_length(text) + return f"{text[i + 1:]}{text[: i + 1]}ay" + + raise ValueError(f"Unhandled word in Pig Latin translation: '{text}'") + + +def is_rule_3(text: str) -> bool: + """ + Check if a word starts with zero or more consonants followed by "qu". + + :param text: + :return: + """ + if "qu" in text: + if text[:2] == "qu": + return True + + for char in text[: text.index("qu")]: + if is_vowel(char): + return False + return True + return False + + +def is_rule_4(text: str) -> bool: + """ + Check if a word starts with one or more consonants followed by "y". + + :param text: + :return: + """ + if "y" in text and text[0] != "y": + for char in text[: text.index("y")]: + if is_vowel(char): + return False + return True + return False + + +def is_vowel(char: str) -> bool: + """ + Check if a character is a vowel (a, e, i, o, or u). + + :param char: The character to check + :return: True if the character is a vowel, False otherwise + """ + return char in "aeiou" + + +def is_consonant(char: str) -> bool: + """ + Check if a character is a consonant (one of the 21 non-vowel letters). + + :param char: The character to check + :return: True if the character is a consonant, False otherwise + """ + return char.isalpha() and not is_vowel(char) + + +def get_consonant_cluster_length(text: str) -> int: + """ + Find the length of the consonant cluster at the beginning of a word. + + :param text: The word to analyze + :return: The index of the last consonant in the initial consonant cluster + """ + i = 0 + for n, char in enumerate(text): + if is_consonant(char): + i = n + else: + break + + return i