Implement to_json and from_json about sdk-python HOT 3 CLOSED

@evankanderson you had mentioned the creation of to_json and from_json methods previously. I would like clarification on what you thought the json should consist of. I'm unsure if to_json should return a json object which looks like this:

{"attributes": ..., "data": ...}

The above would allow users to directly read the data and pass it into the CloudEvent constructor. Another option could be more HTTP oriented such as:

{"headers": ..., "body": ...}

Let me know what you had in mind!

from sdk-python.

I was thinking of the json data exchange format defined here:

https://github.com/cloudevents/spec/blob/v1.0/json-format.md

from sdk-python.

Note that the payload may be encoded as either data or data_base64, depending on its contents.

from sdk-python.