--- a/Lib/multiprocessing/forking.py +++ b/Lib/multiprocessing/forking.py @@ -183,7 +183,7 @@ else: import time from pickle import dump, load, HIGHEST_PROTOCOL - from _multiprocessing import win32, Connection, PipeConnection + from _multiprocessing import win32 from .util import Finalize def dump(obj, file, protocol=None): @@ -411,6 +411,9 @@ else: # Make (Pipe)Connection picklable # + # Late import because of circular import + from .connection import Connection, PipeConnection + def reduce_connection(conn): if not Popen.thread_is_spawning(): raise RuntimeError(