How can I get the average grade of each list from a nested list?

Question

I am currently getting a "TypeError: unsupported operand type(s) for +: 'int' and 'str' " message. Here is my code

def studentGrades(gradeList):
    avgGrades = [ ]
    for element in gradeList:
        isinstance(element, int)
        i = 0
        for j in element:
            i = i + j
        average = (sum(element) / len(element))
        avgGrades.append(average)
    return avgGrades

`isinstance(element, int)` does nothing. You ignore the return value. — Mad Physicist, Sep 06 '18 at 20:55
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score 0 · Answer 1 · answered Sep 06 '18 at 20:56

0

looks like you just need to convert j to an int, like this:

for j in element:

    i = i + int(j)

answered Sep 06 '18 at 20:56

rm-vanda

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How can I get the average grade of each list from a nested list?

1 Answers1