code: def make_hashcode(uuid, filepath, file_event):
          
  
          content = ':'.join([uuid, filepath, file_event])
          hashcode = hashlib.sha1(content.encode('utf-8'))
          return hashcode.hexdigest()
docs: Generate a SHA1 based on the given arguments.
          :param uuid: perceval uuid of the item
          :param filepath: path of the corresponding file
          :param file_event: commit file event
          :returns: a SHA1 hash code