title: python- moving files and checking duplicate names
body: <p>I'm trying to make a code that can move files from one folder to another. 
  For instance, I have files named 0001.jpg, 0002.jpg ... and so on in /test1/ folder and want to move those files to /test3/ folder if the same file name doesn't exist in /test2/.
  So, if there's 0001.jpg both in folder /test1/ and /test2/ the file in /test1/ won't be moved to /test3/ folder but if there's 0002.jpg in /test1/ and not in /test2/, it moves to /test/3.</p>
  
  <p>I've tried to write the code on my own but it won't work.
  Can you please help with this?
  Thanks in advance! </p>
  
  <pre><code>import os
  import shutil
  
  def Move_files(root_path, refer_path, out_path) :
      root_path_list= [file for file in os.listdir(root_path)]
      refer_path_list= [file for file in os.listdir(refer_path)]
  
      for file in root_path_list:
          if refer_path_list in root_path_list:
              shutil.move(os.path.join(os.listdir(root_path, file)),os.path.join(os.listdir(refer_path, file)))
  
  if __name__ == '__main__' :
      Move_files("D:\\Dataset\\test1", "D:\\Dataset\\test2", "D:\\Dataset\\test3")
  </code></pre>