code: def interpret(marker, execution_context=None):
      
      try:
          expr, rest = parse_marker(marker)
      except Exception as e:
          raise SyntaxError('Unable to interpret marker syntax: %s: %s' % (marker, e))
      if rest and rest[0] != '#':
          raise SyntaxError('unexpected trailing data in marker: %s: %s' % (marker, rest))
      context = dict(DEFAULT_CONTEXT)
      if execution_context:
          context.update(execution_context)
      return evaluator.evaluate(expr, context)
docs: Interpret a marker and return a result depending on environment.
  
      :param marker: The marker to interpret.
      :type marker: str
      :param execution_context: The context used for name lookup.
      :type execution_context: mapping