如何保存分类器textblob NaiveBayesClassifier的结果？

NaiveBayesclassifier根据我选择的给定主题，我正在使用TextBlob进行文本分析。

数据巨大（约3000个条目）。

尽管我能够得到结果，但是如果不再次调用该函数并等待数小时直到处理完成，就无法保存它以备将来使用。

我尝试通过以下方法腌制

ab = NaiveBayesClassifier(data)

import pickle

object = ab
file = open('f.obj','w') #tried to use 'a' in place of 'w' ie. append
pickle.dump(object,file)

我得到一个错误，如下所示：

Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "C:\Python27\lib\pickle.py", line 1370, 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 419, in save_reduce
    save(state)
  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 649, in save_dict
    self._batch_setitems(obj.iteritems())
  File "C:\Python27\lib\pickle.py", line 663, in _batch_setitems
    save(v)
  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 600, in save_list
    self._batch_appends(iter(obj))
  File "C:\Python27\lib\pickle.py", line 615, in _batch_appends
    save(x)
  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 562, 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 649, in save_dict
    self._batch_setitems(obj.iteritems())
  File "C:\Python27\lib\pickle.py", line 662, in _batch_setitems
    save(k)
  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 501, in save_unicode
    self.memoize(obj)
  File "C:\Python27\lib\pickle.py", line 247, in memoize
    self.memo[id(obj)] = memo_len, obj
MemoryError

我也尝试过sPickle，但它也会导致错误，例如：

#saving object with function sPickle.s_dump
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "C:\Python27\lib\site-packages\sPickle.py", line 22, in s_dump
    for elt in iterable_to_pickle:
TypeError: 'NaiveBayesClassifier' object is not iterable

#saving object with function sPickle.s_dump_elt
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "C:\Python27\lib\site-packages\sPickle.py", line 28, in s_dump_elt
    pickled_elt_str = dumps(elt_to_pickle)
MemoryError: out of memory

谁能告诉我保存对象该怎么做？

还是通过某种方式保存了分类器的结果以备将来使用？