On 7 August 2013 15:46, Peter Otten <__pete...@web.de> wrote:
> import copy_reg
> import multiprocessing
> import new
"new" is deprecated from 2.6+; use types.MethodType instead of
new.instancemethod.
> def make_instancemethod(inst, methodname):
> return getattr(inst, methodname)
This is just getattr -- you can replace the two uses of
make_instancemethod with getattr and delete this ;).
> def pickle_instancemethod(method):
> return make_instancemethod, (method.im_self, method.im_func.__name__)
>
> copy_reg.pickle(
> new.instancemethod, pickle_instancemethod, make_instancemethod)
>
> class A(object):
> def __init__(self, a):
> self.a = a
> def fun(self, b):
> return self.a**b
>
> if __name__ == "__main__":
> items = range(10)
> pool = multiprocessing.Pool(4)
> print pool.map(A(3).fun, items)
Well that was easy. The Stackoverflow link made that look *hard*. -1
to my hack, +1 to this.
You can do this in one statement:
copy_reg.pickle(
types.MethodType,
lambda method: (getattr, (method.im_self, method.im_func.__name__)),
getattr
)
--
http://mail.python.org/mailman/listinfo/python-list
