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Using Collections

Installing a Collection

To use a Prefect Collection, first install the collection via pip.

As an example, to use prefect-aws:

pip install prefect-aws

Registering Blocks from a Collection

Once the Prefect Collection is installed, register the blocks within the collection to view them in the Prefect Cloud UI:

As an example, to register the blocks available in prefect-aws:

prefect block register -m prefect_aws.credentials
prefect block register -m prefect_aws.ecs

Using Tasks and Flows from a Collection

Collections also contain pre-built tasks and flows that can be imported and called within your code.

As an example, to read a secret from AWS Secrets Manager with the read_secret task:

from prefect import flow
from prefect_aws import AwsCredentials
from prefect_aws.secrets_manager import read_secret

def connect_to_database():
    aws_credentials = AwsCredentials.load("MY_BLOCK_NAME")
    secret_value = read_secret(

    # Use secret_value to connect to a database

Note, to use the load method on Blocks, you must already have a block document saved through code or saved through the UI.