title: Using multiple versions of Python
body: <p>I have both Python 3.3 and Python 2.7  installed on my computer. The python 3.3 works fine, but when I try to run something using python 2.7, it is still referencing python 3.3. </p>
  
  <p>For Example: if I type <code>F:\Python33\python33.exe test1.py</code>, it will run with 3.3 and work fine, but if I type <code>F:\Python27\python27.exe test1.py</code> it gives this error:   </p>
  
  <pre><code>File "F:\PYTHON33\LIB\site.py", line 173
      file=sys.stderr)
          ^
  SyntaxError: invalid syntax
  </code></pre>
  
  <p>Note: I have renamed the Python 2.7 and 3.3 .exe's to python27.exe and python33.exe respectively.</p>
  
  <p>Any help would be appreciated, Thank you.</p>