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class DataLoader(object):
    def __init__(self, image_size, batch_size):
        
        self.image_size = image_size
        self.batch_size = batch_size
        
        # 80% train data, 10% validation data, 10% test data
        split_weights = (8, 1, 1)
        splits = tfds.Split.TRAIN.subsplit(weighted=split_weights)
        

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user.delete()

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user.name = "Marko"

# Update
user.save()

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read_users = User.objects

for user in User.objects:
    print("Name: {}; Age: {}; Blog: {}".format(user.name, user.age, user.blog))

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user = User(
    name = "Rubik",
    age = 33,
    blog = "rubikscode.net")

# Create Operation
user.save()

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class User(Document):
    name = StringField(required=True, max_length=50)
    age = IntField(required=True)
    blog = StringField(required=True, max_length=50)

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from mongoengine import * 

connect('local', host='localhost', port=27017)

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result = user_repo.delete_many({'blog':'rubikscode.net'})
print(result.acknowledged)

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result = user_repo.delete({'name':'Nikola'})
print(result.acknowledged)

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class UserRepository(object):
    def __init__(self):
        mongoclient = MongoClient('localhost', 27017)
        #mongoclient = MongoClient('mongodb://localhost:27017')
        
        database = mongoclient.local
        self._users = database.user
    
    # Create operations
    def insert(self, user):