[Python] Float types are not supported. Use Decimal types instead

I'm using Python 3.7 to store data in a DynamoDB database and encountering the following error message when I try and write an item to the database:

Float types are not supported. Use Decimal types instead.


My code:

ddb_table = my_client.Table(table_name)

with ddb_table.batch_writer() as batch:
for item in items:
item_to_put: dict = json.loads(json.dumps(item), parse_float=Decimal)

# Send record to database.
batch.put_item(Item=item_to_put)


"items" is a list of Python dicts. If I print out the types of the "item_to_put" dict, they are all of type str.

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