How to get entire post data as json?

`g[post_id]` returns a graph object. To access the node, I used `g[post_id]()` which failed.

Then I tried `g[post_id].likes` which also returned a graph object but when I tried to access the nodes as `g[post_id].likes()` I get error.

Can you please help me with getting the entire json of the post from post_id
