code: def exists(self, filename):
          
          if is_package(filename):
              filepath = os.path.join(self.connection["mount_point"],
                                      "Packages", filename)
          else:
              filepath = os.path.join(self.connection["mount_point"],
                                      "Scripts", filename)
          return os.path.exists(filepath)
docs: Report whether a file exists on the distribution point.
  
          Determines file type by extension.
  
          Args:
              filename: Filename you wish to check. (No path! e.g.:
                  "AdobeFlashPlayer-14.0.0.176.pkg")