Jinja
Jinja is a Python templating engine that generates text by rendering templates containing static content, expressions, variables, and control structures with supplied data.
A Pythonic Adventure: From Python basics to a working web app
A Jinja template is a template containing markup and placeholders that can be rendered into an HTML page with supplied data.
- How it is used
- Creates Flask HTML pages from supplied variables, lists, dictionaries, and database-order rows.
- How deep it goes
- Demonstrates value interpolation and for-loop rendering, without detailing broader Jinja features.
- Examples
- Uses drink, flavor, and topping select menus plus an orders table rendered from database rows.
- What you can do after
- Apply it via Flask to render dynamic menus, order confirmations, and order tables.
Read how A Pythonic Adventure: From Python basics to a working web app explains Jinja →
The Well-Grounded Python Developer: How the pros use Python and Flask
Jinja2 is a Python template engine that renders text, including web pages, from templates containing static and dynamically generated content.
- How it is used
- Combines server-generated values with HTML to deliver dynamic pages from Flask routes.
- How deep it goes
- Works from a single placeholder through template inheritance and a loop, without exploring rendering internals.
- Examples
- Uses a current-time page, a visit counter, and a generated color list to illustrate placeholders and loops.
- What you can do after
- Apply it via Flask’s `render_template` to build pages with dynamic values and a reusable layout.
Read how The Well-Grounded Python Developer: How the pros use Python and Flask explains Jinja →
Coding with AI
Jinja2 is a Python templating engine that renders text or HTML from templates containing expressions and control directives.
- How it is used
- Connects Flask route data with HTML pages and interactive interfaces such as database listings and quiz questions.
- How deep it goes
- Demonstrates variable interpolation, loops, route integration, and template placement without developing Jinja syntax beyond these rendering tasks.
- Examples
- Uses database question listings, repeated data items, and a quiz form that displays questions and answer options.
- What you can do after
- Build Flask pages that pass Python data into Jinja templates and render values or repeated records in HTML.
Data Pipelines with Apache Airflow, Second Edition
Jinja-based templating is the generation of text by evaluating expressions and substitutions embedded in a Jinja template.
- How it is used
- Parameterizes Airflow task arguments at run time to create reusable workflows and execution-specific paths or queries.
- How deep it goes
- Defines interpolation, context values, datetime formatting, templated-attribute allowlists, and PythonOperator exceptions.
- Examples
- Demonstrates user-name interpolation, Wikipedia download URLs, date-partitioned event files, and dynamically generated SQL.
- What you can do after
- Apply it via Airflow operators and verify rendered arguments with the `airflow tasks render` command.
Read how Data Pipelines with Apache Airflow, Second Edition explains Jinja →
Related concepts
- prompt flowused by · Prompt Flow is an open-source Microsoft toolset for designing, evaluating, testing, and deploying workflows that combine prompts, language models, and code.
- templateuses · A template is a reusable structure with fixed elements and variable parts for creating or generating similar content, outputs, or artifacts.
- Flaskused by · Flask is a lightweight Python web framework based on WSGI for building web applications and services.
- render_templateused by · render_template is a Flask function that combines a named template with supplied context data and returns the resulting rendered response.
- dbtused by · dbt is an open-source SQL-centric tool for defining, testing, documenting, and deploying modular data transformations and analytical data models.
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