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53 changes: 24 additions & 29 deletions pig-latin/pig_latin.py
Original file line number Diff line number Diff line change
Expand Up @@ -16,7 +16,7 @@ def translate(text: str) -> str:
:param text: The English text to translate
:return: The text translated to Pig Latin
"""
words: list[str] = text.lower().split(" ")
words: list[str] = text.split(" ")
return " ".join(process_word(word) for word in words)


Expand All @@ -31,35 +31,37 @@ def process_word(text: str) -> str:
if not text:
return ""

text_lower: str = text.lower()

# Rule 1
if is_vowel(text[0]) or text[:2] in ("xr", "yt"):
if is_vowel(text_lower[0]) or text_lower[: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 is_rule_3(text_lower):
# 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")
i = text_lower.index("qu")
return f"{text[i + 2 :]}{text[: i + 2]}ay"

# Rule 4
if is_rule_4(text):
if is_rule_4(text_lower):
# 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")
i = text_lower.index("y")
return f"{text[i:]}{text[:i]}ay"

# Rule 2
if not is_vowel(text[0]):
if not is_vowel(text_lower[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)
i = get_consonant_cluster_index(text_lower)
return f"{text[i + 1 :]}{text[: i + 1]}ay"

raise ValueError(f"Unhandled word in Pig Latin translation: '{text}'")
Expand All @@ -69,32 +71,25 @@ def is_rule_3(text: str) -> bool:
"""
Check if a word starts with zero or more consonants followed by "qu".

:param text:
:return:
:param text: The word to check
:return: True if the word matches the pattern, False otherwise
"""
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
qu_indx: int = text.index("qu")
return all(not is_vowel(char) for char in text[: qu_indx])
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:
:param text: The word to check
:return: True if the word matches the pattern, False otherwise
"""
if "y" in text and text[0] != "y":
for char in text[: text.index("y")]:
if is_vowel(char):
return False
return True
y_indx: int = text.index("y")
return all(not is_vowel(char) for char in text[: y_indx])
return False


Expand All @@ -108,18 +103,18 @@ def is_vowel(char: str) -> bool:
return char in "aeiou"


def get_consonant_cluster_length(text: str) -> int:
def get_consonant_cluster_index(text: str) -> int:
"""
Find the length of the consonant cluster at the beginning of a word.
Find the index of the last consonant in the initial consonant cluster.

: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):
index: int = 0
for i, char in enumerate(text):
if not is_vowel(char):
i = n
index = i
else:
break

return i
return index
4 changes: 4 additions & 0 deletions pig-latin/pig_latin_test.py
Original file line number Diff line number Diff line change
Expand Up @@ -12,6 +12,10 @@


class PigLatinTest(unittest.TestCase):

def test_word_with_capital_letter(self):
self.assertEqual(translate("Queen"), "eenQuay")

def test_word_beginning_with_a(self):
self.assertEqual(translate("apple"), "appleay")

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