Add custom initializer argument to multiprocess.Manager*, courtesy of lekma
diff --git a/Lib/multiprocessing/managers.py b/Lib/multiprocessing/managers.py
index 02e96b9..fde0e40 100644
--- a/Lib/multiprocessing/managers.py
+++ b/Lib/multiprocessing/managers.py
@@ -475,12 +475,15 @@
dispatch(conn, None, 'dummy')
self._state.value = State.STARTED
- def start(self):
+ def start(self, initializer=None, initargs=()):
'''
Spawn a server process for this manager object
'''
assert self._state.value == State.INITIAL
+ if initializer is not None and not hasattr(initializer, '__call__'):
+ raise TypeError('initializer must be a callable')
+
# pipe over which we will retrieve address of server
reader, writer = connection.Pipe(duplex=False)
@@ -488,7 +491,7 @@
self._process = Process(
target=type(self)._run_server,
args=(self._registry, self._address, self._authkey,
- self._serializer, writer),
+ self._serializer, writer, initializer, initargs),
)
ident = ':'.join(str(i) for i in self._process._identity)
self._process.name = type(self).__name__ + '-' + ident
@@ -509,10 +512,14 @@
)
@classmethod
- def _run_server(cls, registry, address, authkey, serializer, writer):
+ def _run_server(cls, registry, address, authkey, serializer, writer,
+ initializer=None, initargs=()):
'''
Create a server, report its address and run it
'''
+ if initializer is not None:
+ initializer(*initargs)
+
# create server
server = cls._Server(registry, address, authkey, serializer)
diff --git a/Lib/multiprocessing/pool.py b/Lib/multiprocessing/pool.py
index 9da27d4..bc7e8f1 100644
--- a/Lib/multiprocessing/pool.py
+++ b/Lib/multiprocessing/pool.py
@@ -92,6 +92,9 @@
except NotImplementedError:
processes = 1
+ if initializer is not None and not hasattr(initializer, '__call__'):
+ raise TypeError('initializer must be a callable')
+
self._pool = []
for i in range(processes):
w = self.Process(