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import pickle

# 和json模块差不多
# 将python对象转换为二进制数据
pickle.dumps(obj=user_data)

# 将二进制python数据转换为python对象
pickle.loads(user_data_pickle_str)

# 读写数据
with open('data', 'wb') as fp:
	pickle.dump(obj=data, file=fp)

with open('data', 'rb') as fp:
	data = pickle.load(file=fp)