PR suggestions

README.md

@@ -66,6 +66,14 @@ seamlessly used inside of `asyncio` coroutines, without ever blocking
 the event loop.
 
 
+What's new
+----------
+
+`v2.0.0`
+
+- Add support for universal pickling using [`dill`](https://github.com/uqfoundation/dill), installable with `pip install aioprocessing[dill]`. The library will now attempt to import [`multiprocess`](https://github.com/uqfoundation/multiprocess), falling back to stdlib `multiprocessing`. Force stdlib behaviour by setting a non-empty environment variable `AIOPROCESSING_DILL_DISABLED=1`. This can be used to avoid [errors](https://github.com/dano/aioprocessing/pull/36#discussion_r631178933) when attempting to combine `aioprocessing[dill]` with stdlib `multiprocessing` based objects like `concurrent.futures.ProcessPoolExecutor`.
+
+
 How does it work?
 -----------------
 

aioprocessing/__init__.py

@@ -26,8 +26,8 @@
 # is zero for an official release, positive for a development branch,
 # or negative for a release candidate or beta (after the base version
 # number has been incremented)
-version = "1.2.0"
-version_info = (1, 2, 0, 0)
+version = "2.0.0"
+version_info = (2, 0, 0, 0)
 
 if hasattr(multiprocessing, "get_context"):
 

aioprocessing/managers.py

@@ -1,20 +1,20 @@
 import asyncio
 from multiprocessing.util import register_after_fork
 from queue import Queue
-
-from aioprocessing.locks import _ContextManager
-from .executor import _ExecutorMixin
-from .mp import (
+from threading import (
     Barrier,
     BoundedSemaphore,
     Condition,
     Event,
     Lock,
     RLock,
     Semaphore,
-    managers as _managers,
 )
 
+from aioprocessing.locks import _ContextManager
+from .executor import _ExecutorMixin
+from .mp import managers as _managers
+
 
 AioBaseQueueProxy = _managers.MakeProxyType(
     "AioQueueProxy",

aioprocessing/mp.py

@@ -1,5 +1,8 @@
 # flake8: noqa
+import os
 try:
+    if os.environ.get("AIOPROCESSING_DILL_DISABLED"):
+        raise ImportError
     from multiprocess import *
     from multiprocess import connection, managers, util
 except ImportError: