Problem with json in python

[DzmiVas]

Hello! i'm trying to study python as first language, and just try repeat code (yes, literally its copypaste), but i have some problems. I know that in this moment somebody told , stop to study this, but i wanna this, because its interesting dor me, and i need in help from you. When i try to make one program, like dictionary, just simple dictionary, which back for user meaning of entering word, i have an error like this. Please, if you can, help me, maybe for you it's not big problem, but for me it's a BIG step in programming.
Best regards!