I just wanted to say that this challenge was significantly harder than all the previous introduction challenges. For someone just getting started with Python, this is quite a daunting challenge, and took about 10x longer than the previous challenges.

n = int(raw_input())
mydict = {}
for line in range(n):
    info = raw_input().split(" ")
    score = map(float, info[1:])
    mydict[info[0]] = sum(score) / float(len(score))

print "%.2f" % round(mydict[raw_input()],2) 

My Solution

print( format(sum(student_marks[query_name])/len(student_marks[query_name]), ".2f") )

This ramped up way too hard in difficulty, after looking at the solution I felt really frustrated because the optimal solution includes things that were not touched on at all in previous problems. Should be marked as intermediate.

This was my solution. No, I didn't solve it in one line but I'm new and to me this is easy to follow.

if __name__ == '__main__':
    n = int(input())
    student_marks = {}
    for _ in range(n):
        name, *line = input().split()
        scores = list(map(float, line))
        student_marks[name] = scores
    query_name = input()
    
    
    for key, value in student_marks.items():
        if query_name == key:
            sum = 0
            count = 0
            for i in value:
                sum += i
                count += 1
            average = sum/count
            print("{:.2f}".format(average))