tweak names and style

Signed-off-by: technillogue <technillogue@gmail.com>

python/cog/server/http.py

@@ -287,10 +287,7 @@ async def predict(
         respond_async = prefer == "respond-async"
 
         with trace_context(make_trace_context(traceparent, tracestate)):
-            return _predict(
-                request=request,
-                respond_async=respond_async
-            )
+            return await shared_predict(request=request, respond_async=respond_async)
 
     @limited
     @app.put(
@@ -309,16 +306,8 @@ async def predict_idempotent(
         Run a single prediction on the model (idempotent creation).
         """
         if request.id is not None and request.id != prediction_id:
-            raise RequestValidationError(
-                [
-                    ErrorWrapper(
-                        ValueError(
-                            "prediction ID must match the ID supplied in the URL"
-                        ),
-                        ("body", "id"),
-                    )
-                ]
-            )
+            err = ValueError("prediction ID must match the ID supplied in the URL")
+            raise RequestValidationError([ErrorWrapper(err, ("body", "id"))])
 
         # We've already checked that the IDs match, now ensure that an ID is
         # set on the prediction object
@@ -328,13 +317,12 @@ async def predict_idempotent(
         respond_async = prefer == "respond-async"
 
         with trace_context(make_trace_context(traceparent, tracestate)):
-            return _predict(
+            return shared_predict(
                 request=request,
                 respond_async=respond_async,
             )
 
-
-    async def _predict(
+    async def shared_predict(
         *, request: Optional[PredictionRequest], respond_async: bool = False
     ) -> Response:
         # [compat] If no body is supplied, assume that this model can be run