32 lines
960 B
Python
32 lines
960 B
Python
import sys, re, string
|
|
|
|
def extract_words(path_to_file):
|
|
"""
|
|
Takes a path to a file and returns the non-stop
|
|
words, after properly removing nonalphanumeric chars
|
|
and normalizing for lower case
|
|
"""
|
|
if type(path_to_file) is not str or not path_to_file:
|
|
return []
|
|
|
|
try:
|
|
with open(path_to_file) as f:
|
|
str_data = f.read()
|
|
except IOError as e:
|
|
print "I/O error({0}) when opening {1}: {2}".format(e.errno, path_to_file, e.strerror)
|
|
return []
|
|
|
|
pattern = re.compile('[\W_]+')
|
|
word_list = pattern.sub(' ', str_data).lower().split()
|
|
|
|
try:
|
|
with open('../stop_words.txt') as f:
|
|
stop_words = f.read().split(',')
|
|
except IOError as e:
|
|
print "I/O error({0}) when opening ../stops_words.txt: {1}".format(e.errno, e.strerror)
|
|
return []
|
|
|
|
stop_words.extend(list(string.ascii_lowercase))
|
|
return [w for w in word_list if not w in stop_words]
|
|
|