酸洗对象 [英] Pickling objects

问题描述

我需要腌制对象[wxpython frame object]并将其作为参数发送给多处理池模块上的函数apply_async 有人可以给我一个例子，我该怎么做 我尝试了以下操作，并收到一条错误消息:

I need to pickle object [wxpython frame object] and send it as a prameter to this function apply_async on multiproccessing pool module could someone provide me an example how can I do it I tried the following and get an error message :

myfile = file(r"C:\binary.dat", "w")
pickle.dump(self, myfile)
myfile.close()


self.my_pool.apply_async(fun,[i,myfile])

def fun(i,self_object):
    window = pickle.load(self_oject)
    wx.CallAfter(window.LogData, msg)

有人可以告诉我可能是什么问题

could someone tell me what could be the problem

如果错误在最后一条错误消息下方提供了一些指示符，则我得到: _reduce_ex中的文件"C:\ Python26 \ lib \ copy_reg.py"，第70行 引发TypeError，无法腌制％s对象"％base.名称 TypeError:无法腌制PySwigObject对象

If the error give some indicator below the last error message i get: File "C:\Python26\lib\copy_reg.py", line 70, in _reduce_ex raise TypeError, "can't pickle %s objects" % base.name TypeError: can't pickle PySwigObject objects

推荐答案

您无法序列化可在另一个进程中使用的窗口小部件.我猜您想从multiprocessing模块启动的另一个进程中更改GUI内容.在这种情况下，您应该在父流程中定义一个回调函数，当子流程的结果准备好时，该回调函数将被调用.因此，您可以使用 apply_async的回调"参数.

You can not serialize a widget for use in another process. I guess you want to change the GUI content from another process that is started by the multiprocessing module. In that case, you should define a callback function in the parent process that gets called when the result of the sub-process is ready. Therefore you can use the "callback" parameter of apply_async.

类似的东西:

def fun(i):
    # do something in this sub-process and then return a log message
    return "finished doing something"

def cb(resultFromFun):
    wx.CallAfter(window.LogData, resultFromFun)

my_pool.apply_async(fun, [i], callback = cb)

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