How to use the azure-mgmt-resource.azure.mgmt.resource.resources.v2016_09_01.models.plan.Plan function in azure-mgmt-resource

def __init__(self, name=None, publisher=None, product=None, promotion_code=None):
        super(Plan, self).__init__()
        self.name = name
        self.publisher = publisher
        self.product = product
        self.promotion_code = promotion_code

def __init__(self, **kwargs):
        super(Plan, self).__init__(**kwargs)
        self.name = kwargs.get('name', None)
        self.publisher = kwargs.get('publisher', None)
        self.product = kwargs.get('product', None)
        self.promotion_code = kwargs.get('promotion_code', None)