You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
45 lines
1.9 KiB
45 lines
1.9 KiB
import feature_extraction.lexicons as lexicons
|
|
from utils.constants import REGEX_CONSTANTS
|
|
|
|
""" List of supported features for feature extraction from Input String """
|
|
FEATURE_LIST = ['COMPARE', 'CONTRAST', 'RESULT', 'USE', 'IMPORTANT', 'RESEARCH', 'APPROACH',
|
|
'PUBLIC', 'BEFORE', 'BETTER_SOLUTION', 'PROFESSIONALS', 'CITATION', 'ACRONYM',
|
|
'CONTAINS_YEAR', 'SEQUENCE', 'REFERENCE', 'PERCENTAGE', 'URL']
|
|
|
|
""" Features with Regex Pattern Matching - For these features, get the regex pattern from constants"""
|
|
REGEX_FEATURES = ['ACRONYM', 'CONTAINS_YEAR', 'SEQUENCE', 'REFERENCE', 'PERCENTAGE', 'URL']
|
|
|
|
|
|
def extract_features_from_text(text: str):
|
|
"""
|
|
This function takes text string as input, extracts and returns a list of features by checking each word in
|
|
:`~feature_extraction.lexicons.ALL_LEXICONS`
|
|
:param text: takes string text as param
|
|
:return: returns a list of extracted features from the text, empty list for no features
|
|
"""
|
|
|
|
# ALL_LEXICONS
|
|
lexicon_dict = lexicons.ALL_LEXICONS
|
|
|
|
text_feature_list = []
|
|
# Iterate through the list features and get list of words from the lexicon dictionary,
|
|
# for each word in the word list, check if it appears in input text and add it to the text feature list
|
|
for feature in FEATURE_LIST:
|
|
|
|
# If the feature is Regex Pattern Match, get the pattern from :`~feature_extraction.lexicons.ALL_LEXICONS`
|
|
# and match it with the input text
|
|
if feature in REGEX_FEATURES:
|
|
pattern = REGEX_CONSTANTS[feature]
|
|
if bool(pattern.match(text)):
|
|
text_feature_list.append(feature)
|
|
continue
|
|
|
|
# If the feature is not a Regex Pattern Match, then get the list of dictionary words from lexicon dictionary
|
|
word_list = lexicon_dict[feature]
|
|
for word in word_list:
|
|
if word in text:
|
|
text_feature_list.append(feature)
|
|
break
|
|
|
|
return text_feature_list
|