import csv
from decimal import Decimal


def cvstolist(filename):
    price =[]
    quant = []

    with open( filename, 'r') as csvf:
        csvobj = csv.reader(csvf)

        for row in csvobj:
            yield row[0], row[1]



chosenloss = 4

for price,quant in cvstolist("input.csv"):
    perc1 = (Decimal(price) /100)
    losspercoin = Decimal(chosenloss)/Decimal(quant)
    print('lossprcoin = {}'.format(losspercoin))

    exitpricechosenloss = Decimal(price) - Decimal(losspercoin)
    print('exitpricechosenloss = {}'.format(exitpricechosenloss))
    print('perc1 = {}'.format(perc1))
    percchosenlosspercoin = exitpricechosenloss / perc1