pytorch

02af4b51 - Enhance Pipe docs to explicitly mention RPC initialization. (#55187)

Enhance Pipe docs to explicitly mention RPC initialization. (#55187) Summary: Pull Request resolved: https://github.com/pytorch/pytorch/pull/55187 As described in https://github.com/pytorch/pytorch/issues/54927, Pipe docs didn't explicitly mention initializing RPC. This PR improves the docs and also ensures Pipe throws a more useful error message when RPC is not initialized and not an internal assertion error. ghstack-source-id: 125563552 Test Plan: 1) unit test added. 2) waitforbuildbot Reviewed By: rohan-varma Differential Revision: D27521783 fbshipit-source-id: d1a5c6ca789b9a66c07a794468178c25cfd4b743