py1

herdsize = input("Enter herd size:")

records = {} #initialize record where cow names and data will be stored
minimumdata = {} #record data which is below minimum yield
totaldays = 2
minimumyield = 5 #litres
def Processing():
    for i in range(1,totaldays+1):
        print("Day " +str(i) +":")
        print("-----------")
        #return 
        for j in range(0,herdsize):
            cowname = raw_input("enter cow identity:")
            if not cowname in records:
                records[cowname]=[] #initialize array for this cowname if first time
            #data1[i]=0
            milkqty = raw_input("how much milked:")
            records[cowname].append(milkqty)

    totalyield = 0.0 #all days
    topcowname = ""
    topcowyield = 0.0
    
    print()
    print("--------------------")
    print("       RESULTS      ")
    print("--------------------")
    for k in records:
        cowname = k
        cowdata = records[k] #array of values (milk recorded)
        cowaverage = 0
        cowyieldtmp = 0
        for value in cowdata:
            milkquantity = float(value)
            totalyield = totalyield+milkquantity
            cowaverage = cowaverage+milkquantity
            cowyieldtmp = cowyieldtmp + milkquantity
            if milkquantity<minimumyield:
                if not cowname in minimumdata:
                    minimumdata[cowname] = 0 #initialize
                minimumdata[cowname] = minimumdata[cowname]+1
        if cowyieldtmp>topcowyield:
            topcowname = cowname
            topcowyield = cowyieldtmp

        print("average for "+cowname + ":" + str(cowaverage/totaldays))

    print("total yield for all cows: "+str(round(totalyield,0)))
    print("most productive cow: "+ topcowname+ ", weekly yield: " + str(topcowyield))
    for cowname in minimumdata:
        if minimumdata[cowname]>4:
            print("unsatisfactory yield: "+cowname)
    

Processing()