我们从Python开源项目中，提取了以下2个代码示例，用于说明如何使用google.appengine.ext.db.Expando()。
def test_get(self): x = self.klass() # not a class type with self.assertRaises(TypeError): x.get(chr, '') # not a subclass of db.Model/db.Expando with self.assertRaises(TypeError): x.get(Spam, '') x = self.klass() with self.assertRaises(KeyError): x.get(models.PetModel, 'foo') self.assertEqual(x, {models.PetModel: {}}) obj = object() x[models.PetModel]['foo'] = obj obj2 = x.get(models.PetModel, 'foo') self.assertEqual(id(obj), id(obj2)) self.assertEqual(x, {models.PetModel: {'foo': obj}})
def test_add(self): x = self.klass() # not a class type with self.assertRaises(TypeError): x.set(chr, '') # not a subclass of db.Model/db.Expando with self.assertRaises(TypeError): x.set(Spam, '') # wrong type for key with self.assertRaises(TypeError): x.set(models.PetModel, 3) x = self.klass() pm1 = models.PetModel(type='cat', name='Jessica') pm2 = models.PetModel(type='dog', name='Sam') pe1 = models.PetExpando(type='cat', name='Toby') self.assertEqual(x, {}) x.set(models.PetModel, 'foo', pm1) self.assertEqual(x, {models.PetModel: {'foo': pm1}}) x.set(models.PetModel, 'bar', pm2) self.assertEqual(x, {models.PetModel: {'foo': pm1, 'bar': pm2}}) x.set(models.PetExpando, 'baz', pe1) self.assertEqual(x, { models.PetModel: {'foo': pm1, 'bar': pm2}, models.PetExpando: {'baz': pe1} })
