Add Reflex integration

[ObservedObserver]

Summary

• add Reflex communication layer and API to render PygWalker in Reflex apps
• provide example reflex_demo.py demonstrating usage
• document Reflex example in examples README

Testing

• pip install pytest (fails: Could not find a matching distribution)
• pytest tests (fails: command not found)

[cursor]

Bug: Router Issues: Validation, JSON Conversion, Path Mismatch

The _pygwalker_router function has three distinct issues:

• Input Validation: It accesses json_data["action"] and json_data["data"] without validation, causing a KeyError and API endpoint failure if these keys are missing from the request payload.
• JSON Conversion Inefficiency: It performs an unnecessary double JSON conversion by serializing the result to a string and then immediately deserializing it before returning the JSONResponse.
• Path Mismatch: There is an inconsistency between BASE_URL_PATH (defined without a leading slash) and PYGWALKER_ROUTE (defined with a leading slash), which may prevent frontend requests from correctly matching the API endpoint.

pygwalker/communications/reflex_comm.py#L11-L35

pygwalker/pygwalker/communications/reflex_comm.py

Lines 11 to 35 in 13c838c

	BASE_URL_PATH = "/_pygwalker/comm/".strip("/")
	async def _pygwalker_router(req: Request) -> Response:
	gid = req.path_params["gid"]
	comm_obj = reflex_comm_map.get(gid, None)
	if comm_obj is None:
	return JSONResponse({"success": False, "message": f"Unknown gid: {gid}"})
	json_data = await req.json()
	result = comm_obj._receive_msg(json_data["action"], json_data["data"])
	result = json.dumps(result, cls=DataFrameEncoder)
	return JSONResponse(json.loads(result))
	class ReflexCommunication(BaseCommunication):
	"""Communication class for Reflex."""
	def __init__(self, gid: str) -> None:
	super().__init__(gid)
	reflex_comm_map[gid] = self
	PYGWALKER_ROUTE = Route(
	"/_pygwalker/comm/{gid}",

Fix in Cursor

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