How to use the keen.exceptions.InvalidProjectIdError function in keen

def check_project_id(project_id):

            ''' Python 2.x-compatible string typecheck. '''

            if not project_id or not isinstance(project_id, basestring):
                raise exceptions.InvalidProjectIdError(project_id)
    else:

def check_project_id(project_id):

            ''' Python 3.x-compatible string typecheck. '''

            if not project_id or not isinstance(project_id, str):
                raise exceptions.InvalidProjectIdError(project_id)

def __init__(self, project_id):
        super(InvalidProjectIdError, self).__init__(project_id)
        self.project_id = project_id
        self._message = "Invalid project id: {0}".format(project_id)