Why there is an error in the code below?

Question

https://code.sololearn.com/wOO324k8WY0F/?ref=app

Answer 1

I've put the brackets, but notting came of it.

Answer 2

That's right. Thank You very much

Answer 3

line 18 you forget $ before obj

Answer 4

Try bracketting your for.

Answer 5

You forgot $ for obj too