Выгодная покупка

import csv
sp = []
with open('wares.csv', encoding="utf8") as csvfile:
    reader = csv.reader(csvfile, delimiter=';', quotechar=',')
    for index, row in enumerate(reader):
        sp.append(row)
f = []
for i in range(len(sp)):
    if int(sp[i][1]) > 1000:
        f.append(i)
if len(f) == len(sp):
    print('error')
else:
    j = 0
    for i in range(len(f)):
        sp.pop(f[i - j])
        j += 1
    f = []
    for i in range(len(sp)):
        f.append(int(sp[i][1]))
    for i in range(len(sp)):
        if len(sp) == 1:
            print(sp[0][0])
            break
        mi = min(f)
        index = f.index(mi)
        print(sp[index][0], end=', ')
        sp.pop(index)
        f.pop(index)

def calculate(tuples: list) -> str:
    amount_left, max_number = 1000, 10
    # оставляем только товары дешевле или равные нашей сумме и сортируем их
    sorted_stuff = sorted((tuple_ for tuple_ in tuples if tuple_[1] <= amount_left), key=lambda x: x[1])
    if not sorted_stuff:
        return 'error'
    result = []
    for pair in sorted_stuff:
        name, price = pair
        if amount_left >= price:
            number_to_buy = amount_left // price
            if number_to_buy > max_number:
                number_to_buy = max_number
            result += [name for _ in range(number_to_buy)]
            amount_left -= number_to_buy * price
    return ', '.join(result)
 
 
if __name__ == '__main__':
    test_1 = [('Товар1', 6000), ('Товар2', 8000), ('Товар3', 63545), ('Товар4', 7000)]
    test_2 = [('Товар1', 6000), ('Товар2', 8000), ('Товар3', 63545), ('Товар4', 1000)]
    test_3 = [('Товар1', 6000), ('Товар2', 400), ('Товар3', 5), ('Товар4', 1000)]
    assert calculate(test_1) == 'error'
    assert calculate(test_2) == 'Товар4'
    assert calculate(test_3) == 'Товар3, Товар3, Товар3, Товар3, Товар3, Товар3, Товар3, Товар3, Товар3, Товар3, ' \
                                'Товар2, Товар2'

import csv
 
 
def make_ans(lst):
    ans = list()
    total = 1000
    if int(lst[0][1]) > 1000:
        return 'error'
    ind = 0
    goods = {'0': 0}
    while True:
        if total - int(lst[ind][1]) >= 0 and goods[str(ind)] != 10:
            total -= int(lst[ind][1])
            ans.append(lst[ind][0])
            goods[str(ind)] += 1
        else:
            if ind + 1 == len(lst):
                break
            else:
                ind += 1
                goods[str(ind)] = 0
    return ', '.join(ans)
 
 
with open('wares.csv', encoding="utf8") as csvfile:
    reader = csv.reader(csvfile, delimiter=';', quotechar='"')
    strings = sorted([x for x in reader], key=lambda x: int(x[1]))
 
 
print(make_ans(strings))