feat(python): Add flags & namespaces api

[jarviliam]

Summary

Adds the apis for Flag and Namespace operations.
Test sessions will run under a uuid4 generated namespace so that theres no conflict between mutiple test runs

My company uses these flag/namespace operations so having them in the official server-sdk would make it easier to adopt. I just assumed that they are missing here but if there are actually no plans to implement them just let me know and I'll close this PR 👍

[markphelps]

Hey @jarviliam

Thanks for the contribution and sorry for the slow reply!
We're not currently planning to support these resource management endpoints in these SDKs at this time.

Previously we were using a tool to handle auto-generating clients in multiple languages.
While this enabled us to scale the number of languages we support, it lacked in terms of flexibility and maintainability when it came to keeping dependencies up to date and so on. So we decided to ultimately move away, and instead hand-craft clients for this smaller API surface area.

That said though, we do intend to maintain these management APIs in Flipt and ensure backward compatibility for them. However, we intend to keep these particular SDK clients isolated to evaluation only for now.

We would love to understand what you're use case is here for these APIs.
It would help us to decide whether we need to bring back support or build additional clients for them.

I could see how adding support for ListNamespaces and ListFlags could make sense though ,as its often required to dynamically query which flags/namespaces can be evaluated before actually evaluating.

[jarviliam]

@markphelps Understandable! Feel free to close out this PR then 👌

We would love to understand what you're use case is here for these APIs.

The main use-case missing from these sdks is really ListFlags in my opinion. We have a situation where the Frontend would like a list of enabled UI features for a user. We currently have our front-end call a backend api that calls flipt. Like you mentioned, the flags are dynamic so we have to fetch a list of flags and batch evaluate each flag. Having this in the SDK would basically fit all our use-cases for flipt at the moment. (No pressure though, we can still get by with our own internal http client calling the endpoints)

Thanks for all the work on Flipt!

[markphelps]

@jarviliam I think list flags 💯 percent makes sense to add to all our revamped sdks.

Would you mind pairing this PR down to adding list flags for python and I will make sure we implement it for other languages as well? We just did the same for our client side evaluation sdks

[jarviliam]

@markphelps Ran the linter and rebased on latest 🙇

[markphelps]

cheers! thanks @jarviliam !!