Load AppMaster data in Python using dltHub

Build a AppMaster-to-database or-dataframe pipeline in Python using dlt with automatic Cursor support.

In this guide, we'll set up a complete AppMaster data pipeline from API credentials to your first data load in just 10 minutes. You'll end up with a fully declarative Python pipeline based on dlt's REST API connector, like in the partial example code below:

Example code
@dlt.source
def appmaster_source(access_token=dlt.secrets.value):
    config: RESTAPIConfig = {
        "client": {
            "base_url": "https://opentdb.com/api.php",
            "auth": {
                "type": "bearer",
                "token": access_token,
            },
        },
        "resources": [
            GET, DELETE
        ],
    }
    [...]
    yield from rest_api_resources(config)


def get_data() -> None:
    # Connect to destination
    pipeline = dlt.pipeline(
        pipeline_name='appmaster_pipeline',
        destination='duckdb',
        dataset_name='appmaster_data', 
    )
    # Load the data
    load_info = pipeline.run(appmaster_source())
    print(load_info)

Why use dltHub Workspace with LLM Context to generate Python pipelines?

  • Accelerate pipeline development with AI-native context
  • Debug pipelines, validate schemas and data with the integrated Pipeline Dashboard
  • Build Python notebooks for end users of your data
  • Low maintenance thanks to Schema evolution with type inference, resilience and self documenting REST API connectors. A shallow learning curve makes the pipeline easy to extend by any team member
  • dlt is the tool of choice for Pythonic Iceberg Lakehouses, bringing mature data loading to pythonic Iceberg with or without catalogs

What you’ll do

We’ll show you how to generate a readable and easily maintainable Python script that fetches data from appmaster’s API and loads it into Iceberg, DataFrames, files, or a database of your choice. Here are some of the endpoints you can load:

  • Trivia Questions: GET requests to retrieve trivia questions with customizable parameters (amount, category)
  • Products: GET, POST, PUT, and DELETE operations for managing product resources by ID
  • Resources: GET, POST, PUT, and DELETE operations for managing resources with filtering, pagination, and status parameters
  • City Management: DELETE operations for removing city records by ID

You will then debug the AppMaster pipeline using our Pipeline Dashboard tool to ensure it is copying the data correctly, before building a Notebook to explore your data and build reports.

Setup & steps to follow

💡
Before getting started, let's make sure Cursor is set up correctly:

Now you're ready to get started!

  1. ⚙️ Set up dlt Workspace

    Install dlt with duckdb support:

    pip install dlt[workspace]

    Initialize a dlt pipeline with AppMaster support.

    dlt init dlthub:appmaster duckdb

    The init command will setup the necessary files and folders for the next step.

  2. 🤠 Start LLM-assisted coding

    Here’s a prompt to get you started:

    Prompt
    Please generate a REST API Source for AppMaster API, as specified in @appmaster-docs.yaml 
Start with endpoint(s) GET and DELETE and skip incremental loading for now. 
Place the code in appmaster_pipeline.py and name the pipeline appmaster_pipeline. 
If the file exists, use it as a starting point. 
Do not add or modify any other files. 
Use @dlt rest api as a tutorial. 
After adding the endpoints, allow the user to run the pipeline with python appmaster_pipeline.py and await further instructions.

  3. 🔒 Set up credentials

    Authentication in REST APIs can use several schemes: Basic Authentication sends base64-encoded username and password via the Authorization header; API Key, OAuth 2.0, and JSON Web Token (JWT) are also commonly used. The documentation indicates credentials are sent via the Authorization header, but specific implementation details for API Key, OAuth 2.0, and JWT are not provided in this excerpt.

    To get the appropriate API keys, please visit the original source at appmaster.io. If you want to protect your environment secrets in a production environment, look into setting up credentials with dlt.

  4. 🏃‍♀️ Run the pipeline in the Python terminal in Cursor

    python appmaster_pipeline.py

    If your pipeline runs correctly, you’ll see something like the following:

    Pipeline appmaster load step completed in 0.26 seconds
1 load package(s) were loaded to destination duckdb and into dataset appmaster_data
The duckdb destination used duckdb:/appmaster.duckdb location to store data
Load package 1749667187.541553 is LOADED and contains no failed jobs

  5. 📈 Debug your pipeline and data with the Pipeline Dashboard

    Now that you have a running pipeline, you need to make sure it’s correct, so you do not introduce silent failures like misconfigured pagination or incremental loading errors. By launching the dlt Workspace Pipeline Dashboard, you can see various information about the pipeline to enable you to test it. Here you can see:

    • Pipeline overview: State, load metrics
    • Data’s schema: tables, columns, types, hints
    • You can query the data itself
    dlt pipeline appmaster_pipeline show

  6. 🐍 Build a Notebook with data explorations and reports

    With the pipeline and data partially validated, you can continue with custom data explorations and reports. To get started, paste the snippet below into a new marimo Notebook and ask your LLM to go from there. Jupyter Notebooks and regular Python scripts are supported as well.

    import dlt

data = dlt.pipeline("appmaster_pipeline").dataset()
# get GET table as Pandas frame
data.GET.df().head()

Extra resources:

Next steps