francais_nettoyage_nuages

import nltk
from nltk.corpus import stopwords

def nettoyage(txt) :
    liste = txt.split()
    clean = [i.lower() for i in liste if i.isalpha() and i not in stopwords.words("french")]    
    clean_txt = " ".join(clean)
    return clean_txt

fichier = open('GROS_FICHIER_NUAGES.txt', 'r', encoding = "utf-8")
fichier_string = fichier.read()  

new = open("gros_fich_nuages_nett.txt", "w", encoding = "utf-8")

ok = nettoyage(fichier_string)
new.write(ok)