title: check if the file exist if not create new dir and create file inside the dir and return the file inside the dir
body: <pre><code>import os
  
  def new_directory(directory, filename):
    # Before creating a new directory, check to see if it already exists
  
    # Create the new file inside of the new directory
  
    # Return the list of files in the new directory
  
  print(new_directory("PythonPrograms", "script.py"))
  </code></pre>