#NEWLINE# def addPolicyURI( self , policy_uri ) : #NEWLINE# #INDENT# 'Add an acceptable authentication policy URI to this request\n\n        This method is intended to be used by the relying party to add\n        acceptable authentication types to the request.\n\n        @param policy_uri: The identifier for the preferred type of\n            authentication.\n        @see: http://openid.net/specs/openid-provider-authentication-policy-extension-1_0-01.html#auth_policies\n        ' #NEWLINE# if ( policy_uri not in self . preferred_auth_policies ) : #NEWLINE# #INDENT# self . preferred_auth_policies . append ( policy_uri )