Problem
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| import numpy as np
import multiprocessing as mp
class A:
def __init__(self):
lock = mp.Manager().Lock()
def save(self):
np.save('./dict.npy', self.__dict__)
a_class = A()
a_class.save()
a_dict = np.load('./dict.npy')
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| ValueError: Object arrays cannot be loaded when allow_pickle=False
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However, if we try use a_dict = np.load('./dict.npy'), allow_pickle=True.
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| FileNotFoundError: [WinError 2] 系统找不到指定的文件。
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Solution
mp.Manager().Lock() can not be pickled. Though it works well when being saved, it cannot be loaded.
To Solve it, remove lock from self.__dict__.
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| import numpy as np
import multiprocessing as mp
class A:
def __init__(self):
self.abc = 'abc'
self.lock = mp.Manager().Lock()
def save(self):
save_dict = self.__dict__.copy()
save_dict.pop('lock', None)
np.save('./dict.npy', save_dict)
a_class = A()
a_class.save()
a_dict = np.load('./dict.npy')
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