Feature Request: Falcon 7B support

[sidharthiimc]

I tried MPT end to end in script form. Works like charm.

Can you provide a similar support to new Falcon model?

[LLukas22]

llm-rs-python is a wrapper around rustformers/llm.
If the falcon support lands in rustformers/llm via rustformers/llm#293 i'll include it in the wrapper.