将列表从一个功能传递到另一个功能

Question

I need help understanding this instruction.

Your main program code should call the “getData” function. Pass the list returned from the “summer” function to “getData” and save the sum that function returns.

def getData():
    fin = open("sample.dat","r")
    numbers=[]
    for line in fin:
        val =line.rstrip()
        numbers.append(val)
    return numbers
def summer(lst):
    sum=0
    for n in range(0,13,2):
        sum+=powerval(lst[n],lst[n+1])
    return sum

Answer 1

If the instruction read,

Pass the list returned by the getData function to summer and save the sum that function returns.

then try:

total = summer(getData())

Answer 2

I think this satisfies the requirements.

def getData(lst):
    for l in lst:
        do something with sum
    save sum
    return sum

invoke as:
    getData(summer(some_other_data))