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Python Data Loading from mux to motherduck using dlt Library

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This guide provides technical documentation on how to load data from mux, a platform that simplifies the process of building video applications, to motherduck, an in-process analytical database known for its fast performance and SQL dialect support. The process leverages dlt, an open-source Python library, to facilitate the data transfer. For a comprehensive understanding of mux, visit https://www.mux.com/. The guide will walk you through the steps of setting up and executing this data pipeline effectively.

dlt Key Features​

  • Scalable Data Extraction: dlt offers scalable data extraction by leveraging iterators, chunking, and parallelization techniques. This approach allows for efficient processing of large datasets by breaking them down into manageable chunks. Learn more
  • Implicit Extraction DAGs: dlt incorporates the concept of implicit extraction DAGs to handle the dependencies between data sources and their transformations automatically. Learn more
  • Governance Support: dlt pipelines offer robust governance support through three key mechanisms: pipeline metadata utilization, schema enforcement and curation, and schema change alerts. Learn more
  • Schema Enforcement and Curation: dlt empowers users to enforce and curate schemas, ensuring data consistency and quality. Learn more
  • Schema Evolution: dlt enables proactive governance by alerting users to schema changes. When modifications occur in the source data’s schema, dlt notifies stakeholders. Learn more

Getting started with your pipeline locally​

0. Prerequisites​

dlt requires Python 3.8 or higher. Additionally, you need to have the pip package manager installed, and we recommend using a virtual environment to manage your dependencies. You can learn more about preparing your computer for dlt in our installation reference.

1. Install dlt​

First you need to install the dlt library with the correct extras for MotherDuck:

pip install "dlt[motherduck]"

The dlt cli has a useful command to get you started with any combination of source and destination. For this example, we want to load data from Mux to MotherDuck. You can run the following commands to create a starting point for loading data from Mux to MotherDuck:

# create a new directory
mkdir my-mux-pipeline
cd my-mux-pipeline
# initialize a new pipeline with your source and destination
dlt init mux motherduck
# install the required dependencies
pip install -r requirements.txt

The last command will install the required dependencies for your pipeline. The dependencies are listed in the requirements.txt:

dlt[motherduck]>=0.3.5

You now have the following folder structure in your project:

my-mux-pipeline/
├── .dlt/
│   ├── config.toml          # configs for your pipeline
│   └── secrets.toml         # secrets for your pipeline
├── mux/                   # folder with source specific files
│   └── ...
├── mux_pipeline.py        # your main pipeline script
├── requirements.txt         # dependencies for your pipeline
└── .gitignore               # ignore files for git (not required)

2. Configuring your source and destination credentials​

The dlt cli will have created a .dlt directory in your project folder. This directory contains a config.toml file and a secrets.toml file that you can use to configure your pipeline:

config.toml​

# put your configuration values here

[runtime]
log_level="WARNING"  # the system log level of dlt
# use the dlthub_telemetry setting to enable/disable anonymous usage data reporting, see https://dlthub.com/docs/telemetry
dlthub_telemetry = true

secrets.toml​

# put your secret values and credentials here. do not share this file and do not push it to github

[sources.mux]
mux_api_access_token = "mux_api_access_token" # please set me up!
mux_api_secret_key = "mux_api_secret_key" # please set me up!

[destination.motherduck.credentials]
database = "database" # please set me up!
password = "password" # please set me up!
Further help setting up your source and destinations

Please consult the detailed setup instructions for the MotherDuck destination in the dlt destinations documentation.

Likewise you can find the setup instructions for Mux source in the dlt verifed sources documentation.

3. Running your pipeline for the first time​

The dlt cli has also created a main pipeline script for you at mux_pipeline.py, as well as a folder mux that contains additional python files for your source. These files are your local copies which you can modify to fit your needs. In some cases you may find that you only need to do small changes to your pipelines or add some configurations, in other cases these files can serve as a working starting point for your code, but will need to be adjusted to do what you need them to do.

The main pipeline script will look something like this:

import dlt
from mux import mux_source


def load_yesterday_video_views() -> None:
    pipeline = dlt.pipeline(
        pipeline_name="mux", destination='motherduck', dataset_name="mux_data"
    )
    load_info = pipeline.run(mux_source())
    print(load_info)


if __name__ == "__main__":
    load_yesterday_video_views()

Provided you have set up your credentials, you can run your pipeline like a regular python script with the following command:

python mux_pipeline.py

4. Inspecting your load result​

You can now inspect the state of your pipeline with the dlt cli:

dlt pipeline mux info

You can also use streamlit to inspect the contents of your MotherDuck destination for this:

# install streamlit
pip install streamlit
# run the streamlit app for your pipeline with the dlt cli:
dlt pipeline mux show

5. Next steps to get your pipeline running in production​

One of the beauties of dlt is, that we are just a plain Python library, so you can run your pipeline in any environment that supports Python >= 3.8. We have a couple of helpers and guides in our docs to get you there:

The Deploy section will show you how to deploy your pipeline to​

  • Deploy with Github Actions: dlt provides an easy way to deploy your pipelines using Github Actions. This method is ideal for those who want to leverage the power of Github's in-built CI/CD runner.
  • Deploy with Airflow: For users who prefer to manage their pipelines with Airflow, dlt offers a simple way to deploy your pipelines with Airflow. This method is perfect for those who want to take advantage of Airflow's robust scheduling and monitoring capabilities.
  • Deploy with Google Cloud Functions: If you're working in a Google Cloud environment, dlt enables you to easily deploy your pipelines using Google Cloud Functions. This is a great option for those who want to leverage the scalability and flexibility of Google Cloud.
  • Other Deployment Options: dlt supports a variety of other deployment options to suit your specific needs. Check out the complete list to explore other ways to deploy your dlt pipelines.

The running in production section will teach you about:​

  • Monitor Your Pipeline: With dlt, you can easily monitor your data pipeline to ensure it's running smoothly and efficiently. This includes inspecting load information, saving load info and trace, and inspecting, saving, and alerting on schema changes. Get more details here.
  • Set Up Alerts: dlt allows you to set up alerts to notify you of any changes or issues in your data pipeline. This proactive approach helps you to take immediate action when necessary, ensuring your data pipeline remains operational and efficient. Learn how to set up alerts here.
  • Set Up Tracing: Tracing is a crucial aspect of running a data pipeline in production. dlt provides you with the tools to set up tracing, allowing you to track and manage your data pipeline effectively. Find out how to set up tracing here.

Available Sources and Resources​

For this verified source the following sources and resources are available

Source mux_source​

Mux_source provides data on video content and viewing metrics from the Mux platform.

Resource NameWrite DispositionDescription
assets_resourcemergeFetches metadata about video assets from the Mux API's "assets" endpoint
views_resourceappendFetches data about every video view from yesterday from the Mux API

Additional pipeline guides​

This demo works on codespaces. Codespaces is a development environment available for free to anyone with a Github account. You'll be asked to fork the demo repository and from there the README guides you with further steps.
The demo uses the Continue VSCode extension.

Off to codespaces!

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