title: No module named 'nltk'
body: <p>I successfully installed <code>nltk</code> and works fine. I have to run a file where <code>nltk</code> was imported and tensorflow too ,hence, i have to activate <code>tensorflow</code>. </p>
  
  <p>When I activate <code>tensorflow</code> the .py file i want to run gives an error. I have read some solution but they didn't help. </p>
  
  <pre><code>HP-250-G5-Notebook-PC:~$ python
  Python 3.6.3 |Anaconda custom (64-bit)| (default, Oct 13 2017, 12:02:49) 
  [GCC 7.2.0] on linux
  Type "help", "copyright", "credits" or "license" for more information.
  &gt;&gt;&gt; import nltk
  &gt;&gt;&gt; 
  </code></pre>
  
  <p>this works fine but this does not</p>
  
  <pre><code>(tensorflow)HP-250-G5-Notebook-PC:~/AIG2018/Chatbot$ python
  Python 3.5.2 (default, Nov 23 2017, 16:37:01) 
  [GCC 5.4.0 20160609] on linux
  Type "help", "copyright", "credits" or "license" for more information.
  &gt;&gt;&gt; import nltk
  Traceback (most recent call last):
  File "&lt;stdin&gt;", line 1, in &lt;module&gt;
  </code></pre>
  
  <p>What is that I am doing worng?</p>
  
  <blockquote>
    <p>ImportError: No module named 'nltk'</p>
  </blockquote>