2. Loading Sample Data

awstin.dynamodb.Table.put_item() takes instances of the data model to insert into DynamoDB after serialization.

awstin handles conversions between float and Decimal internally, so float can be used when instantiating data models.

import json

from models import Movie

from awstin.dynamodb import DynamoDB


def load_movies(movies):
    dynamodb = DynamoDB()
    table = dynamodb[Movie]

    for movie_json in movies:
        movie = Movie(
            title=movie_json["title"],
            year=movie_json["year"],
            info=movie_json["info"],
        )
        table.put_item(movie)


if __name__ == "__main__":
    with open("moviedata.json", "r") as json_file:
        movie_list = json.load(json_file)
    load_movies(movie_list)

awstin.dynamodb.DynamoModel has awstin.dynamodb.DynamoModel.serialize() and awstin.dynamodb.DynamoModel.deserialize() methods to convert between DynamoDB representations of data and the data models, and can be used to read data from JSON.

import json

from models import Movie

from awstin.dynamodb import DynamoDB


def load_movies(movies):
    dynamodb = DynamoDB()
    table = dynamodb[Movie]

    for movie in movies:
        table.put_item(movie)


if __name__ == "__main__":
    with open("moviedata.json", "r") as json_file:
        movie_list = json.load(json_file)
    load_movies([Movie.deserialize(movie) for movie in movie_list])