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text_cleaner.py
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text_cleaner.py
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import re
import unicodedata
import os
def strip_accents(text):
"""
Strip accents from input String.
:param text: The input string.
:type text: String.
:returns: The processed String.
:rtype: String.
"""
try:
text = unicode(text, 'utf-8')
except (TypeError, NameError): # unicode is a default on python 3
pass
text = unicodedata.normalize('NFD', text)
text = text.encode('ascii', 'ignore')
text = text.decode("utf-8")
return str(text)
def strip_digitsAndSpecialChars(text):
"""
Convert input text to id.
:param text: The input string.
:type text: String.
:returns: The processed String.
:rtype: String.
"""
text = re.sub('[ ]+', ' ', text)
#substitute values that aren't letters,numbers,underscore or dot
text = re.sub('[^0-9a-zA-Z_.]', ' ', text)
# seperate dot from text by adding whitespace to it
text = re.sub('[.]', ' . ', text)
#substitute digits with whitespace
text = re.sub('[0-9]', ' ', text)
#substitute single letter words with white_space
text = re.sub(r'(?:^| )\w(?:$| )', ' ', text)
return text
def clean_text(text):
"""
Applies all the filters to input text.
:param text: The input string.
:type text: String.
:returns: The processed String.
:return type: String.
"""
text = text.lower()
text = strip_accents(text)
text = strip_digitsAndSpecialChars(text)
return text