code: def is_allowed(self, filepath, excludes=[]):
          
          if os.path.isabs(filepath):
              raise FinderException("'Finder.is_allowed()' only accept relative"
                                    " filepath")
  
          if excludes:
              for pattern in excludes:
                  if fnmatch.fnmatch(filepath, pattern):
                      return False
          return True
docs: Check from exclude patterns if a relative filepath is allowed
  
          Args:
              filepath (str): A relative file path. (exclude patterns are
                  allways based from the source directory).
  
          Keyword Arguments:
              excludes (list): A list of excluding (glob) patterns. If filepath
                  matchs one of patterns, filepath is not allowed.
  
          Raises:
              boussole.exception.FinderException: If given filepath is absolute.
  
          Returns:
              str: Filepath with new extension.