title: LookupError: from nltk.book import*
body: <p>In iPython console I typed <code>from nltk.book import</code> and I got several LookupErrors. Below shows the code I got. </p>
  
  <pre><code>*** Introductory Examples for the NLTK Book ***
  Loading text1, ..., text9 and sent1, ..., sent9
  Type the name of the text or sentence to view it.
  Type: 'texts()' or 'sents()' to list the materials.
  ---------------------------------------------------------------------------
  LookupError Traceback (most recent call last)
  &lt;ipython-input-3-8446809acbd4&gt; in &lt;module&gt;()
   ----&gt; 1 from nltk.book import*
  
  C:\Users\dell\Anaconda\lib\site-packages\nltk-3.0.3-py2.7.egg\nltk\book.py in &lt;module&gt;()
   20 print("Type: 'texts()' or 'sents()' to list the materials.")
   21 
  ---&gt; 22 text1 = Text(gutenberg.words('melville-moby_dick.txt'))
   23 print("text1:", text1.name)
   24 
  
   C:\Users\dell\Anaconda\lib\site-packages\nltk-3.0.3-py2.7.egg\nltk\corpus\util.pyc in __getattr__(self, attr)
   97             raise AttributeError("LazyCorpusLoader object has no attribute '__bases__'")
   98 
   ---&gt; 99         self.__load()
  100         # This looks circular, but its not, since __load() changes our
  101         # __class__ to something new:
  
   C:\Users\dell\Anaconda\lib\site-packages\nltk-3.0.3-py2.7.egg\nltk\corpus\util.pyc in __load(self)
   62             except LookupError as e:
   63                 try: root = nltk.data.find('corpora/%s' % zip_name)
   ---&gt; 64                 except LookupError: raise e
   65 
   66         # Load the corpus.
  
   LookupError: 
   **********************************************************************
   Resource u'corpora/gutenberg' not found.  Please use the NLTK
   Downloader to obtain the resource:  &gt;&gt;&gt; nltk.download()
   Searched in:
  - 'C:\\Users\\dell/nltk_data'
  - 'C:\\nltk_data'
  - 'D:\\nltk_data'
  - 'E:\\nltk_data'
  - 'C:\\Users\\dell\\Anaconda\\nltk_data'
  - 'C:\\Users\\dell\\Anaconda\\lib\\nltk_data'
  - 'C:\\Users\\dell\\AppData\\Roaming\\nltk_data'
  **********************************************************************
  
  In [4]: 
  </code></pre>
  
  <p>Can i know why I get these errors?</p>