def get_structured_sentence(sentence):
seps = separators.get_separators()
buf = ""
rez = []
for letter in sentence:
if letter in seps: # we've got a word
if buf:
rez.append(buf)
rez.append(letter)
buf = ""
else:
buf = buf + letter
return rez
def get_preposition(sentence, name_index):
structured_sentence = get_structured_sentence(sentence)
if name_index > len(structured_sentence) or not is_name(structured_sentence[name_index]):
return None
prepositions_set = set()
for prep_list in cases.prepositions:
for prep in prep_list:
prepositions_set.add(prep)
max_prep_distance = 10 # Maximum 5 words between preposition and name
word = ""
i = 1
punctuation = separators.get_separators().copy()
punctuation.remove(' ')
while word.lower() not in prepositions_set:
word = structured_sentence[name_index - i]
if i > max_prep_distance or name_index - i < 0:
return ""
i += 1
return word.lower()
