# Donyo Ganchev, Agricultural University, Plovdiv, Bulgaria # donyo@abv.bg choice=None def qcr(): gap=input('Enter general amount of pesticide: ') qr=raw_input('Enter quantitative ratios with colon between them: ') sqr=qr.split(':') fqr=[float(i) for i in sqr] sqr=sum(fqr) el_part=gap/sqr am_ratio=[el_part*x for x in fqr] print \ """" """ print "Calculated quantitative ratios are: " , am_ratio while choice!="0": print \ """ Calculation of quantitative concentration ratios 1 - Begin calculation 0 - Exit """ choice= raw_input("Choice: ") if choice == "0": exit() elif choice=="1": qcr()