title: Open a Python file with command line arguments
body: <p>NOTE : I don't know if this has been asked before, but I couldn't find what wording would be used for asking this question</p>
  
  <p>I am creating a python file, and inside it needs to have a name of a file.
  What I want is when you put <code>python Compiler.py &lt;Filename&gt;</code> in the command line, it takes the filename and uses it in the python file.</p>
  
  <p>How would I go about doing this?</p>