diff --git a/solutions/python/pig-latin/3/pig_latin.py b/solutions/python/pig-latin/3/pig_latin.py new file mode 100644 index 0000000..5b8ba02 --- /dev/null +++ b/solutions/python/pig-latin/3/pig_latin.py @@ -0,0 +1,153 @@ +""" +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 text from English to Pig Latin. + + :param text: + :return: + """ + words: list = text.split(' ') + return " ".join(process_text(word) for word in words) + + +def process_text(text: str) -> str: + """ + Convert a string based on 4 rules of Pig Latin. + + :param text: + :return: + """ + # Rule 1 + # If a word begins with a vowel, + # or starts with "xr" or "yt", + # add an "ay" sound to the end of the word. + if is_rule_1(text): + return text + 'ay' + + # Rule 2 + # 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. + if is_rule_2(text): + i = get_last_consonant_indx(text) + return text[i + 1:] + text[: i + 1] + 'ay' + + # Rule 3 + # 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. + if is_rule_3(text): + i = text.index('qu') + return text[i + 2:] + text[:i + 2] + 'ay' + + # Rule 4 + # 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. + if is_rule_4(text): + i = text.index('y') + return text[i:] + text[:i] + 'ay' + + +def is_rule_1(text: str) -> bool: + """ + Check if a word begins with a vowel, or starts with "xr" or "yt". + + :param text: + :return: + """ + if is_vowel(text[0]): + return True + if text[:2] in ("xr", "yt"): + return True + return False + + +def is_rule_2(text: str) -> bool: + """ + Check ff a word begins with one or more consonants. + No 'qu' or 'y' in it. + + :param text: + :return: + """ + return is_consonant(text[0]) and not is_rule_3(text) and not is_rule_4(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: + """ + Test that char in vowels: the letters a, e, i, o, and u. + + :param char: + :return: + """ + return char in "aeiou" + + +def is_consonant(char: str) -> bool: + """ + Check that char is consonant (the other 21 letters of the English alphabet). + + :param char: + :return: + """ + return char.isalpha() and not is_vowel(char) + + +def get_last_consonant_indx(text: str) -> int: + """ + Get last index of consonant inside the string. + + :param text: + :return: + """ + i = 0 + for n, char in enumerate(text): + if is_consonant(char): + i = n + else: + break + + return i