ScratchStemmer

import argparse
from nltk import pos_tag, word_tokenize
from nltk.stem import snowball

parser = argparse.ArgumentParser()
parser.add_argument("file")

options = parser.parse_args()

with open(options.file, 'r') as f:
        gum_text = f.read()

gum_docs = word_tokenize(gum_text)

my_stemmer = snowball.SnowballStemmer("english")
stemmed = []

for documents in gum_docs:
    stemmed.append(my_stemmer.stem(documents))
print(stemmed)