Fixed.

Simple issue,

["name2", 140, ["B", "A", "A", "A"]] 
should be
["name2", 110, ["B", "A", "A", "A"]] 

ohh understood thnx

If there are 5 or more courses and all courses has a grade of B or above, additional 20 points are awarded.

Because of that, name4 has a "C".

why name3 got 160 and name3 and name4 has equal length of array and name3 score is getting 20+ extra because of length so why name4 should not?

total += points.get(score) 

That line is in your code, isn't it? Read the error message:

TypeError: unsupported operand type(s) for +=: 'int' and 'NoneType' 

Not a kata issue. Print the input to debug your code.

name4 should not get +20 at the end

The question is not relevant. I figured out what's wrong.

array = [
["name1", 150, ["B", "A", "A", "C", "A", "A"]],
["name2", 120, ["B", "A", "A", "A"]],
["name3", 160, ["B", "A", "A", "A","A"]],
["name4", 140, ["B", "A", "A", "C", "A"]]
]
name4 A3=303==90+B1=20+C1=10==120+20 (20) OF LENGTH WHY STILL IN OUTPUT?

It would not make sense if the tests for the task were displayed in more detail. And so, I'm at a loss as to what I did wrong. I originally found a solution, it passed the tests. I decided to do a little refactoring. After that, the new solution fails the tests.

Is there a point to this post?

more and all courses has a grade of b or above ;) kinda confused thnx