react-apollo-graphql | Get rid of decorators and use Apollo GraphQL queries | GraphQL library

I am working on a app where I am using react as my front-end and React-apollo-graphql for my api calling.

I am using react-hooks i.e in react 16.8 +

What I am doing

I have crated a auth.js file where I am storing my values when user is loging in and also checking the token is it valid or not, (expiry I am checking),but that file is only loading my I am refreshing or reloading the page, That is not how it should work

My auth.js file

I am using graphql to do my work, In one of my use-case I am using useMutation hook for doing mutation like add,insert or delete.

So here I have input field and button so on click I want to save data in db which is working fine,

My main point is what is the best way to handle the error in react-apollo-graphql in useMutation

currently I am handling the error using promises but I know that is not the best way to do that

What I am doing is

I have hard to find the distinction of which Python is needed when I download some Python project. I know that there is difference between python2 print "Hello world" and python3 print("Hello world"), but not so much more.

For example, there is some interesting demo to try, but after following instructions given there, I still got it not working. So I wonder, does it need version 3 or 2? Needless to say, this project does not use print anywhere ;)

So, what are the key differences in syntax level which may help a beginner to deduct, is there needed Python2 or Python3?

This question is not about getting to run the demo mentioned above, it is about making the distinction of Python versions because this is not the first time to me to wonder about the same problem, because pythonists seem not to point it in their projects very often.

Intended outcome:

MockedProvider should mock my createPost mutation.

Actual outcome: