def add_ending(self, ending=u""):
""" Add an ending to the word, combining vowel-consonant
pairs if necessary """
# If ending begins with a vowel, the word must end with a consonant
# and this consonant-vowel pair should be combined
# If the word doesn't end with a consonant, raise a value error
if TamilLetter.is_vowel(ending[0]):
if TamilLetter.is_consonant(self.word[-1]):
# replace the last letter of the word with the consonant-vowel
# combination, then copy over the rest of the ending
self.word[-1] = TamilLetter.get_combination(self.word[-1], ending[0])
self.word += ending[1:]
# Unless word ends with a consonant, ending cannot start with a vowel
else:
raise ValueError(
"""Invalid word-ending pair - ending
can only start with a vowel if word ends with consonant"""
)
# In all other cases, simply add the ending to the word
self.word += ending
def split_syllables(letters=[]):
""" Returns the syllables in a given word as a list """
# Generic algorithm:
# Each vowel and combination is its own syllable. Consonants and
# aytham get added to the end of the previous syllable
# ensure that the word is a valid word
TamilWord.validate("".join(letters))
# initialize empty list
syllables = []
# loop through letters in the word
for letter in letters:
# if letter is a vowel or combination, it gets its own syllable
if TamilLetter.is_combination(letter) or TamilLetter.is_vowel(letter):
syllables.append(letter)
# if codepoint is a consonant or aytham, add it to the end
# of the previously-added codepoint
elif TamilLetter.is_consonant(letter) or TamilLetter.is_aytham(letter):
# ensure that at least one character already exists
if len(syllables) > 0:
syllables[-1] = syllables[-1] + letter
# if the first letter is a consonant (probably b/c it' s a
# loanword), add it to the beginning of the string
else:
syllables.append(letter)
# if codepoint was neither a vowel, aytham, a pulli or a
# combination ending, an unexpected error has occurred
else:
raise Exception(
"""Unknown error: \'%s\' in word %s is neither
a vowel, consonant, combination or aytham"""
% (letter, "".join(letters))
)
return syllables
def split_syllables(letters=[]):
""" Returns the syllables in a given word as a list """
# Generic algorithm:
# Each vowel and combination is its own syllable. Consonants and
# aytham get added to the end of the previous syllable
# ensure that the word is a valid word
TamilWord.validate(''.join(letters))
# initialize empty list
syllables = []
# loop through letters in the word
for letter in letters:
# if letter is a vowel or combination, it gets its own syllable
if TamilLetter.is_combination(letter) or \
TamilLetter.is_vowel(letter):
syllables.append(letter)
# if codepoint is a consonant or aytham, add it to the end
# of the previously-added codepoint
elif TamilLetter.is_consonant(letter) or \
TamilLetter.is_aytham(letter):
# ensure that at least one character already exists
if len(syllables) > 0:
syllables[-1] = syllables[-1] + letter
# if the first letter is a consonant (probably b/c it' s a
# loanword), add it to the beginning of the string
else:
syllables.append(letter)
# if codepoint was neither a vowel, aytham, a pulli or a
# combination ending, an unexpected error has occurred
else:
raise Exception("""Unknown error: \'%s\' in word %s is neither
a vowel, consonant, combination or aytham""" %
(letter, ''.join(letters)))
def add_ending(self, ending=''):
""" Add an ending to the word, combining vowel-consonant
pairs if necessary """
# If ending begins with a vowel, the word must end with a consonant
# and this consonant-vowel pair should be combined
# If the word doesn't end with a consonant, raise a value error
if TamilLetter.is_vowel(ending[0]):
if TamilLetter.is_consonant(self.word[-1]):
# replace the last letter of the word with the consonant-vowel
# combination, then copy over the rest of the ending
self.word[-1] = TamilLetter.get_combination(self.word[-1], \
ending[0])
self.word += ending[1:]
# Unless word ends with a consonant, ending cannot start with a vowel
else:
raise ValueError("""Invalid word-ending pair - ending
can only start with a vowel if word ends with consonant""")
# In all other cases, simply add the ending to the word
self.word += ending
