ImportError:无法导入名称转换程序python

Question

我正在我的项目中导入nltk库，它给出了以下错误。如果有人有同样的错误，请帮助。

        Traceback (most recent call last):
  File "/home/nitai/Dropbox/thesis/PycharmProjects/auto_tagger2/tagger.py", line 4, in <module>
    import buildVocab
  File "/home/nitai/Dropbox/thesis/PycharmProjects/auto_tagger2/buildVocab.py", line 4, in <module>
    import nltk
  File "/usr/local/lib/python2.7/dist-packages/nltk/__init__.py", line 126, in <module>
    from nltk.stem import *
  File "/usr/local/lib/python2.7/dist-packages/nltk/stem/__init__.py", line 29, in <module>
    from nltk.stem.snowball import SnowballStemmer
  File "/usr/local/lib/python2.7/dist-packages/nltk/stem/snowball.py", line 25, in <module>
    from nltk.stem import porter
ImportError: cannot import name porter

我已经安装了所有的nltk包。我不知道。

Answer 1

如果您已经从NLTK下载了所有数据包，即

>>> import nltk
>>> nltk.download('all')

NLTK中的Porter Stemmer是一个类，而不是包/模块。

您应该改为导入PorterStemmer类：

>>> from nltk.stem import PorterStemmer
>>> porter = PorterStemmer()
>>> porter.stem('went')
u'went'
>>> porter.stem('running')
u'run'

另外，通过安装pip来检查您是否安装了最新稳定版本的NLTK。否则，您可能正在使用不稳定/过时的NLTK版本。请参阅http://www.nltk.org/install.html