To count the word frequency in multiple list

Inspired from the Counter collection that you use:

from glob import glob
from collections import Counter
import re

folderpaths = 'd:/individual-articles'
counter = Counter()

filepaths = glob(os.path.join(folderpaths,'*.txt'))
for file in filepaths:
    with open(file) as f:
        words = re.findall(r'\w+', f.read().lower())
        counter = counter + Counter(words)
print counter

from : https://stackoverflow.com/questions/17399535/to-count-the-word-frequency-in-multiple-documents-python