parameters: (type)
return_statement: return __types[type]['base']
docstring: Returns a base type for the given type or nothing in case the given type is
      not derived.
docstring_summary: Returns a base type for the given type or nothing in case the given type is
      not derived.
docstring_tokens: Returns a base type for the given type or nothing in case the given type is not derived .
function: def base(type):
      """Returns a base type for the given type or nothing in case the given type is
      not derived."""
      assert isinstance(type, basestring)
      return __types[type]['base']
function_tokens: def base ( type ) : assert isinstance ( type , basestring ) return __types [ type ] [ 'base' ]