如何将一个值放入另一个列表？

Question

My program needs to accept inputs from the user, but the input is like Ted,24 , so every input will be separated by comma and I know putting them in a list will be a great idea but I also need to get the average age. Here's my code so far:

namesAge = []
count = 0
ave = 0
total = 0

while True:
    mess=input("Enter name and age: ")
    if mess == "":
        print(namesAge)
        print ("We have ",count," names")
        print ("Total age is",total)
        break
    if "," in mess:
        namesAge.append(mess)
        count = count + 1
    else:
        print("invalid input")

Answer 1

namesAge = []

while True:
    mess=input("Enter name and age: ")
    if mess == "":
        print(namesAge)
        print ("We have {} names".format(len(namesAge)))
        print ("average age is {}".format(sum(namesAge)/len(namesAge))))
        break
    elif "," in mess:
        name, age = mess.split(',')
        namesAge.append(int(age))
    else:
        print("invalid input")