<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def _get_resource_uri(self, guid=None):
 """ Returns the full path that uniquely identifies the resource endpoint. """

        uri = self.uri + '/v1/resource'
        if guid:
            uri += '/' + urllib.quote_plus(guid)
        return uri