Hi @Chris , thanks for the question and welcome to the Solace Community!
According to this feature-per-API breakdown, the Python API doesn’t support PubSub+ Cache requests yet. PubSub+ Messaging APIs
What is your use case? If you’re a customer, you could submit an official feature request to our Support team.
Also, just for clarification: I think the cache request in C# (and other classic APIs) is asynchronous, right? You make the cache request, and then asynchronously the message (or messageS if wildcarded) will start to show up on the callback.