概述
这是我目前的代码:
def f(tup): return some_complex_function(*tup) def main(): pool = Pool(processes=4) #import and process data omitted _args = [(x.some_func1,.05,x.some_func2) for x in list_of_some_class] results = pool.map(f,_args) print results
> Exception in thread Thread-2: Traceback (most recent call last): > File "/usr/lib/python2.7/threading.py",line 551,in __bootstrap_inner > self.run() File "/usr/lib/python2.7/threading.py",line 504,in run > self.__target(*self.__args,**self.__kwargs) File "/usr/lib/python2.7/multiprocessing/pool.py",line 319,in > _handle_tasks > put(task) PicklingError: Can't pickle <type 'instancemethod'>: attribute lookup __builtin__.instancemethod Failed
任何帮助将非常感激.
许多内置类型都可以进行pickle,但实例方法无法进行pickle.所以.05很好,但x.some_func1不是.有关详细信息,请参见What can be pickled and unpickled?.
没有简单的解决方案.您需要重构程序,因此实例方法不需要作为参数传递(或避免使用多进程).
总结
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