generate url and url_name for create、update and delete view
        default url_name is classname_name

def urls(cls):
        """
        generate url and url_name for create、update and delete view
        default url_name is classname_name
        """
        class_name = cls.get_class_name()
        if django.VERSION >= (2, 0):
            return path('{}/'.format(class_name), include([
                path('popup/', cls.create().as_view(), name='{}_popup_create'.format(class_name)),
                path('popup/<int:pk>/', cls.update().as_view(), name='{}_popup_update'.format(class_name)),
                path('popup/delete/<int:pk>/', cls.delete().as_view(), name='{}_popup_delete'.format(class_name)),
            ]))
        else:
            return url(r'^{}/'.format(class_name), include([
                url(r'^popup/$', cls.create().as_view(), name='{}_popup_create'.format(class_name)),
                url(r'^popup/(?P<pk>\d+)/$', cls.update().as_view(), name='{}_popup_update'.format(class_name)),
                url(r'^popup/delete/(?P<pk>\d+)/$', cls.delete().as_view(), name='{}_popup_delete'.format(class_name)),
            ]))