保存（pickle）Scipy KDE

Question

如何保存或保存一个scipy kde以供以后使用？在

import scipy.stats as scs
from sklearn.externals import joblib

kde = scs.gaussian_kde(data, bw_method=.15)
joblib.dump(kde, 'test.pkl')

我尝试了上面的步骤，得到了这个错误：

^{pr2}$

Answer 1

看起来joblib在^{}方法上有问题，我猜是因为方法pickling lambdas has been discussed here中的lambda函数。在

with open('test.pkl', 'wb') as fo:  
    joblib.dump(lambda x,y: x+y, fo)

PicklingError: Can't pickle <function <lambda> at 0x7ff89495d598>: it's not found as __main__.<lambda>

据我所知，cloudpickle和dill都能工作：

^{pr2}$

检查一些数据：

^{3}$