Python: Multiprocessing - Suds - _pickle.PicklingError: Can't pickle <class> attribute lookup failed

Question

我正在建立 SOAP WSDL 连接，然后我想运行在另一个进程中运行（线程不适合）

from suds.client import Client

class dTest:

def setup(self, client):
    ws = Client("http://localhost?wsdl")

    # then I use some SOAP API methods and return dictionary with results
    return result_dict


def test(self, name):
    # in this function I use another SOAP API methods
    return

def main(self, client):

    result_dict = self.setup(client)

    for  name, num in result_dict.items():
        p = multiprocessing.Process(target=self.test, args=[name])
        p.start() # <- on this line I have an error
        p.join(timeout)
        if p.is_alive():
            p.terminate

然后我有一个错误

File "D:\IPWStest\test\dTest.py", line 318, in main
    p.start()
  File "C:\Python34\lib\multiprocessing\process.py", line 105, in start
    self._popen = self._Popen(self)
  File "C:\Python34\lib\multiprocessing\context.py", line 212, in _Popen
    return _default_context.get_context().Process._Popen(process_obj)
  File "C:\Python34\lib\multiprocessing\context.py", line 313, in _Popen
    return Popen(process_obj)
  File "C:\Python34\lib\multiprocessing\popen_spawn_win32.py", line 66, in __init__
    reduction.dump(process_obj, to_child)
  File "C:\Python34\lib\multiprocessing\reduction.py", line 59, in dump
    ForkingPickler(file, protocol).dump(obj)
_pickle.PicklingError: Can't pickle <class 'suds.sudsobject.UserCredentialsType'>: attribute lookup UserCredentialsType on suds.sudsobject failed

我找不到解决此问题的方法。我该如何腌制这条线？

result_dict = self.setup(client)

是否可能存在其他决定？谁能帮我？这个错误是什么意思？

Answer 1

问题出在 setup 函数中。安装程序中的 Web 服务连接 ws 在 test 函数中使用。这就是为什么这个对象不能被腌制的原因。如果您使用 multiprocessing 和 suds 或任何类似的库，则应在每个新进程中创建新连接。

Python: Multiprocessing - Suds - _pickle.PicklingError: Can't pickle <class> attribute lookup failed

Python: Multiprocessing - Suds - _pickle.PicklingError: Can't pickle <class> attribute lookup failed

python

pickle

suds

multiprocessing