find max() value

[tuxandrew]

The values from "testname.txt" has been appended to the following lists.

f=open("testname.txt","r")

list1=[20,40,60,80,40]
list2=[50,60,70,40,30,60]
list3=[40,60,70,80,30,50]
list4=[20,50,60,70,40,60]

r=0
for j in f:
    if r==0:
        r=1
         k=i.split()
         list_names=[]            #will hold the list names
         list_names.append(k[1])
         list_names.append(k[2])
         list_names.append(k[3])
         list_names.append(k[4])
        else:
            w=j.split()
            list_highest=[]
            list_highest.append(w[1])
            list_highest.append(w[2])
            list_highest.append(w[3])
            list_highest.append(w[4])
            print("The highest values of",list_names[j],"=",max(list_highest)) #,  max(list_highest))  ==> is not working

Any alternates to find max() of each list elements?
Any help would be appreciated.

The max(), not working.Any corrections to that is very helpful.