title: Libraries not imported when creating a Python executable with pyinstaller
body: <p>I am trying to build a Python .exe for Windows and am able to create it fine. However, when I run the application, I notice that it cannot perform all of its functions because not all the libraries were imported; PySNMP is not getting imported in specific. When I look at the output of the build process, I notice that PySNMP is not listed at all, even though several of modules in my program import it. Anyone know what could be causing this issue? Thanks!</p>
  
  <p>Here is the code that generates the installer:</p>
  
  <pre><code>FILES = &lt;main program modules (.py)&gt; 
  PyInstaller = C:/Python27/pyinstaller 
  CygPyInstaller = /cygdrive/c/Python27/pyinstaller run : python app.py makespec : $(FILES) @echo "***** PyInstaller: Makespec *****" python $(PyInstaller)/Makespec.py \
   --onefile \
   --windowed \ 
   --icon=Icons/icon.ico \
   --name=Application1045 \ 
   app.py
  </code></pre>