相应的空格应该填什么

ft = open("score.csv","r")
dt ={}
for line in ft.readlines()[1:]:
line = line.strip("\n")
lt =[4]_
sm = 0
for i in lt[1:]:
sm += int(i)
avg =[5]_
[6]_
print(dt)

ft = open("score.csv","r")
dt ={}
for line in ft.readlines()[1:]:
    line = line.strip("\n")
    lt = line.split(',')
    sm = 0
    for i in lt[1:]:
        sm += int(i)
    avg = sm/(len(lt)-1)
    dt[lt[0]] = avg
print(dt)