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v0.5.1
v0.5.1
https://github.com/python/cpython
Tip revision: 74f4bd53e03ded8408bcc2de67cf0f5a4ac5b1a1 authored by Barry Warsaw on 23 February 2012, 15:59:38 UTC
Bump some more copyright years (as per PEP 101), since this is the first
Bump some more copyright years (as per PEP 101), since this is the first
Tip revision: 74f4bd5
mp_newtype.py
#
# This module shows how to use arbitrary callables with a subclass of
# `BaseManager`.
#
# Copyright (c) 2006-2008, R Oudkerk
# All rights reserved.
#
from multiprocessing import freeze_support
from multiprocessing.managers import BaseManager, BaseProxy
import operator
##
class Foo(object):
def f(self):
print 'you called Foo.f()'
def g(self):
print 'you called Foo.g()'
def _h(self):
print 'you called Foo._h()'
# A simple generator function
def baz():
for i in xrange(10):
yield i*i
# Proxy type for generator objects
class GeneratorProxy(BaseProxy):
_exposed_ = ('next', '__next__')
def __iter__(self):
return self
def next(self):
return self._callmethod('next')
def __next__(self):
return self._callmethod('__next__')
# Function to return the operator module
def get_operator_module():
return operator
##
class MyManager(BaseManager):
pass
# register the Foo class; make `f()` and `g()` accessible via proxy
MyManager.register('Foo1', Foo)
# register the Foo class; make `g()` and `_h()` accessible via proxy
MyManager.register('Foo2', Foo, exposed=('g', '_h'))
# register the generator function baz; use `GeneratorProxy` to make proxies
MyManager.register('baz', baz, proxytype=GeneratorProxy)
# register get_operator_module(); make public functions accessible via proxy
MyManager.register('operator', get_operator_module)
##
def test():
manager = MyManager()
manager.start()
print '-' * 20
f1 = manager.Foo1()
f1.f()
f1.g()
assert not hasattr(f1, '_h')
assert sorted(f1._exposed_) == sorted(['f', 'g'])
print '-' * 20
f2 = manager.Foo2()
f2.g()
f2._h()
assert not hasattr(f2, 'f')
assert sorted(f2._exposed_) == sorted(['g', '_h'])
print '-' * 20
it = manager.baz()
for i in it:
print '<%d>' % i,
print
print '-' * 20
op = manager.operator()
print 'op.add(23, 45) =', op.add(23, 45)
print 'op.pow(2, 94) =', op.pow(2, 94)
print 'op.getslice(range(10), 2, 6) =', op.getslice(range(10), 2, 6)
print 'op.repeat(range(5), 3) =', op.repeat(range(5), 3)
print 'op._exposed_ =', op._exposed_
##
if __name__ == '__main__':
freeze_support()
test()