bpo-37116: Use PEP 570 syntax for positional-only parameters. (GH-13700)

Lib/multiprocessing/dummy/__init__.py

@@ -80,7 +80,7 @@ def freeze_support():
 #
 
 class Namespace(object):
-    def __init__(self, **kwds):
+    def __init__(self, /, **kwds):
         self.__dict__.update(kwds)
     def __repr__(self):
         items = list(self.__dict__.items())

Lib/multiprocessing/managers.py

@@ -615,13 +615,10 @@ class BaseManager(object):
         util.info('manager serving at %r', server.address)
         server.serve_forever()
 
-    def _create(*args, **kwds):
+    def _create(self, typeid, /, *args, **kwds):
         '''
         Create a new shared object; return the token and exposed tuple
         '''
-        self, typeid, *args = args
-        args = tuple(args)
-
         assert self._state.value == State.STARTED, 'server not yet started'
         conn = self._Client(self._address, authkey=self._authkey)
         try:
@@ -738,7 +735,7 @@ class BaseManager(object):
             )
 
         if create_method:
-            def temp(self, *args, **kwds):
+            def temp(self, /, *args, **kwds):
                 util.debug('requesting creation of a shared %r object', typeid)
                 token, exp = self._create(typeid, *args, **kwds)
                 proxy = proxytype(
@@ -978,7 +975,7 @@ def MakeProxyType(name, exposed, _cache={}):
     dic = {}
 
     for meth in exposed:
-        exec('''def %s(self, *args, **kwds):
+        exec('''def %s(self, /, *args, **kwds):
         return self._callmethod(%r, args, kwds)''' % (meth, meth), dic)
 
     ProxyType = type(name, (BaseProxy,), dic)
@@ -1017,7 +1014,7 @@ def AutoProxy(token, serializer, manager=None, authkey=None,
 #
 
 class Namespace(object):
-    def __init__(self, **kwds):
+    def __init__(self, /, **kwds):
         self.__dict__.update(kwds)
     def __repr__(self):
         items = list(self.__dict__.items())

Lib/multiprocessing/pool.py

@@ -154,7 +154,7 @@ class _PoolCache(dict):
     notification is done by the use of a queue that is provided when
     instantiating the cache.
     """
-    def __init__(self, *args, notifier=None, **kwds):
+    def __init__(self, /, *args, notifier=None, **kwds):
         self.notifier = notifier
         super().__init__(*args, **kwds)