lex_loader.py

import csv
from collections import defaultdict

d = defaultdict(dict)

with open('lexicon_3.csv') as dict_:
    csv_reader=csv.reader(dict_, delimiter=',')
    
    for row in csv_reader:
        d[row[0]][row[1]] = int(row[2])
        

print(len(d))
print(d['happy'])