python中的数据pickle错误[重复]

Posted 2023-03-12

【中文标题】python中的数据pickle错误[重复]

【英文标题】：Error in data pickle in python [duplicate]

【发布时间】：2017-01-03 19:17:10

【问题描述】：

我需要将我的实习生数据集保存在数据泡菜中。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()

运行时出现如下错误

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？

【问题讨论】：

Pickling class instances

【参考方案1】：

你可以用泡菜

你可以这样保存你的模型：

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

以及稍后加载：

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

【讨论】：

我试过这段代码。但是出现了错误。我把它放在我该如何解决这个问题中？