我需要将我的训练数据集保存到数据pickle中。我使用了以下代码。

self.featureCounts = collections.defaultdict(lambda :0)self.featureVectors = []self.labelCounts = collections.defaultdict(lambda :0) def SaveOnPickle(self):        f = open('dict.pickle', 'wb')        pickle.dump(self.featureCounts, f)        f.close()

运行时出现了以下错误

Traceback (most recent call last):  File "C:/wamp64/www/M360/TrainClassifier.py", line 76, in <module>    Predic.SaveOnPickle()  File "C:/wamp64/www/M360/TrainClassifier.py", line 50, in SaveOnPickle    pickle.dump(self.featureCounts, f)  File "C:\Python27\lib\pickle.py", line 1376, in dump    Pickler(file, protocol).dump(obj)  File "C:\Python27\lib\pickle.py", line 224, in dump    self.save(obj)  File "C:\Python27\lib\pickle.py", line 331, in save    self.save_reduce(obj=obj, *rv)  File "C:\Python27\lib\pickle.py", line 401, in save_reduce    save(args)  File "C:\Python27\lib\pickle.py", line 286, in save    f(self, obj) # Call unbound method with explicit self  File "C:\Python27\lib\pickle.py", line 568, in save_tuple    save(element)  File "C:\Python27\lib\pickle.py", line 286, in save    f(self, obj) # Call unbound method with explicit self  File "C:\Python27\lib\pickle.py", line 754, in save_global    (obj, module, name))pickle.PicklingError: Can't pickle <function <lambda> at 0x021391B0>: it's not found as __main__.<lambda>

如何解决这个问题？

回答：

您可以使用Pickle

您可以这样保存模型：

import picklef = open('my_classifier.pickle', 'wb')pickle.dump(classifier, f)f.close()

稍后加载时：

import picklef = open('my_classifier.pickle', 'rb')classifier = pickle.load(f)f.close()