>>> from sales import sales

>>> ls1 = ['20:Gerdau:True:46.0\n',
...        '11:Acerinox:True:24.2\n',
...        '8:Metinvest:False\n',
...        '6:Acerinox:True:33.0\n']
>>> with open('steel1.txt', 'w') as f:
...     f.writelines(ls1)
>>> dsteel1 = {'Gerdau': [(2, 4, 39.5)],
...           'Metinvest': [(10, 6, 44.6), (1, 7, 65.8)],
...           'Sidetur': [(2, 2, 22.7)]}

>>> sales('steel1.txt', dsteel1, 9)
>>> if dsteel1 !={'Gerdau': [(2, 4, 39.5), (9, 20, 46.0)],
...               'Metinvest': [(1, 7, 65.8), (10, 6, 44.6)],
...               'Sidetur': [(2, 2, 22.7)],
...               'Acerinox': [(9, 6, 33.0), (9, 11, 24.2)]}:
...    print(dsteel1)

>>> ls2 = ['3:Ansteel Group:False\n',
...        '19:Nippon Steel:True:89.1\n',
...        '5:Gerdau:True:213.0\n',
...        '12:Acerinox:True:114.2\n',
...        '21:Cleveland-Cliffs:False\n',
...        '8:Metinvest:True:98.3\n',
...        '25:Gerdau:True:156.8\n',
...        '10:Acerinox:True:46.8\n']
>>> with open('steel2.txt', 'w') as f:
...     f.writelines(ls2)
>>> dsteel2 = {'Ansteel Group': [(1, 2, 33.0), (4, 5, 78.1)],
...           'Nippon Steel': [(2, 3, 43.2), (5, 6, 54.4), (2, 7, 25.0)],
...           'Acerinox': [(2, 4, 39.5)],
...           'Aperam': [(10, 6, 44.6), (1, 7, 65.8)],
...           'Sidetur': [(2, 2, 22.7), (3, 3, 33.9), (4, 4, 44.0)],
...           'Cleveland-Cliffs': [(10, 1, 25.4), (3, 5, 46.0)]}

>>> sales('steel2.txt', dsteel2, 9)
>>> if dsteel2 != {'Ansteel Group': [(1, 2, 33.0), (4, 5, 78.1)],
... 'Nippon Steel': [(2, 3, 43.2), (2, 7, 25.0), (5, 6, 54.4), (9, 19, 89.1)],
... 'Acerinox': [(2, 4, 39.5), (9, 10, 46.8), (9, 12, 114.2)],
... 'Aperam': [(1, 7, 65.8), (10, 6, 44.6)],
... 'Sidetur': [(2, 2, 22.7), (3, 3, 33.9), (4, 4, 44.0)],
... 'Cleveland-Cliffs': [(3, 5, 46.0), (10, 1, 25.4)],
... 'Gerdau': [(9, 5, 213.0), (9, 25, 156.8)],
... 'Metinvest': [(9, 8, 98.3)]}:
...    print(dsteel2)