Issue #3518: Remove references to non-existent BaseManager.from_address()

method

Doc/library/multiprocessing.rst

@@ -1236,9 +1236,10 @@ their parent process exits.  The manager classes are defined in the
       type of shared object.  This must be a string.
 
       *callable* is a callable used for creating objects for this type
-      identifier.  If a manager instance will be created using the
-      :meth:`from_address` classmethod or if the *create_method* argument is
-      ``False`` then this can be left as ``None``.
+      identifier.  If a manager instance will be connected to the
+      server using the :meth:`connect` method, or if the
+      *create_method* argument is ``False`` then this can be left as
+      ``None``.
 
       *proxytype* is a subclass of :class:`BaseProxy` which is used to create
       proxies for shared objects with this *typeid*.  If ``None`` then a proxy

Lib/multiprocessing/managers.py

@@ -455,10 +455,6 @@ class BaseManager(object):
         self._serializer = serializer
         self._Listener, self._Client = listener_client[serializer]
 
-    def __reduce__(self):
-        return type(self).from_address, \
-               (self._address, self._authkey, self._serializer)
-
     def get_server(self):
         '''
         Return server object with serve_forever() method and address attribute

Misc/NEWS

@@ -21,6 +21,9 @@ Core and Builtins
 Library
 -------
 
+- Issue #3518: Remove references to non-existent BaseManager.from_address()
+  method.
+
 - Issue #13857: Added textwrap.indent() function (initial patch by Ezra
   Berch)