alcohol.py

n = None
total_volume = None

n = int(input('Enter number of ingredients: '))
total_volume = float(input('Enter total drink volume: '))

ingredients = []

for i in range(n):
    nth = i + 1
    print(f'-------- Ingredient {nth} --------')
    abv = float(input('Enter alcohol by volume (ABV): '))
    if abv > 1:
        abv = abv / 100
    iv = float(input('Enter volume of ingredient: '))
    ingredients += [abv * iv]

s = sum(ingredients)

total_abv = s / total_volume * 100
proof = round(total_abv * 2)

print(f'Final calculation: ')
print(f'{total_abv} %')
print(f'{proof} proof')
input('Press enter to continue.....')