Cyclic imports might be better avoided?

[rogpeppe]

There's a cyclic dependency between pymacaroons and serializers.
ISTM like this might be better avoided. Here are a few possible
ways of doing so.

• include serializers in the base pymacaroons module
• make serializer a mandatory argument to the serialize method
• define a canonical dict-based format and make serializers
  serialize to and from that format
• pass Macaroon and Caveat constructors as arguments to the
  deserialize method.

[ecordell]

Good points; I considered it a usability tradeoff (for simple cases you get your de/serialization for free).

I've been thinking of doing something more go-like and just throwing Marshal/Unmarshal and MarshalJSON/UnmarshalJSON on the macaroon object as the standard formts. If you want additional serializations (like the protobuf test I have in a branch here) you can just extend the Macaroon object with additional methods.

[rogpeppe]

That seems good to me as long as it's documented how to get access to the data inside the macaroon so it can be serialised. Tbh I'm not sure that I'd extend the object - an external function could work ok, but I'm probably betraying my Go tendencies there.

It's definitely nice to have some serialisation available without having an extra import.