[Python] Missing comparison operator in python object API with --gen-object-api --gen-compare options

[Alex-Ratcliffe]

There is no implementation of the comparison operator in the python generated object API. This will result in unexpected behavior when comparing objects which should be equal, but result in a False output under == as they differ by function members. This can be fixed by adding the eq function to objects generated for the API which check for equality between the fields.

The change is relatively simple, and I have an implementation working. I will create a PR for this if there are no in principle problems.