Working example- httpstreamable

### Question

Hello, has anyone a functioning py example running /mcp via streamable? No matter what I do, the py does not work. Tried similar approach with ts, and there it works well. I'd rather use py so asking. Even if I create as simple server with fastmcp as possible, it does not work. Thank you in an advance 🙏🏼

### Additional Context

_No response_