>>> from tarifa_plana2 import llistat

>>> llistat('consums.txt','resultat1.txt',0.12)
>>> with open('resultat1.txt','r') as f:
...    s = f.read()
>>> s == '444B 3.6\n555C 5.2\n777W 0.1\n'
True

>>> llistat('consums2.txt','resultat2.txt',0.12)
>>> with open('resultat2.txt','r') as f:
...    s = f.read()
>>> s == '444B 27.6\n555C 41.2\n111D 36.4\n777W 12.1\n'
True