              print("Folder exists at {}".format(self.folder))
  
      @staticmethod
      def process_folder():
          """ Override for specific folder processing """
          return list()
  
 
</s>
    @staticmethod
    def valid_extension(filename):
        """ Check whether passed in file has a valid extension """
        extension = os.path.splitext(filename)[1]
        return bool(extension in _image_extensions)

              print("Folder exists at {}".format(self.folder))
  
    @staticmethod
    def valid_extension(filename):
        """ Check whether passed in file has a valid extension """
        extension = os.path.splitext(filename)[1]
        return bool(extension in _image_extensions)

      @staticmethod
      def process_folder():
          """ Override for specific folder processing """
          return list()
  
keep add keep keep keep keep keep
 Alignments Tool - File extension bugfix (#478)

* Add filename extension check for image folders
tools/alignments.py