title: ImportError: No module named twisted
body: <p>I'm pretty new to python and twisted and I tried to run a simple twisted script but failed.</p>
  
  <p>My environment:</p>
  
  <p>MacOX 10.7.2 + Python 2.7.1 + Twisted 11.0.0 + eclipse + PyDev</p>
  
  <p>The script called test.py:</p>
  
  <pre><code>from twisted import reactor
  reactor.run()
  </code></pre>
  
  <p>I tried to run it in the terminal and everything works fine.</p>
  
  <p>Then I opened eclipse and created a new PyDev project then adding a py file called test.py and 
  typed the code above in.</p>
  
  <p>When I tried to run it I got errors like:</p>
  
  <pre><code>Traceback (most recent call last):
  File "/Users/user/Documents/workspace/TwistedDemo/test.py", line 2, in &lt;module&gt;
  from twisted import reactor
  ImportError: No module named twisted
  </code></pre>
  
  <p>Then I checked the PYTHONPATH and added the "twisted source folder" in the external libraries tab but the errors was still there.(nothing changed)</p>
  
  <p>Hope someone can help me out here, thanks in advance :)</p>