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Python Central Hub

Context Processors

A context processor adds variables to the template context for every render.

Useful for:

  • site name
  • current year
  • navigation links
  • feature flags

Example

python
import datetime
 
@app.context_processor
def inject_globals():
    return {
        "site_name": "PythonCentralHub",
        "year": datetime.datetime.now().year,
    }
python
import datetime
 
@app.context_processor
def inject_globals():
    return {
        "site_name": "PythonCentralHub",
        "year": datetime.datetime.now().year,
    }

Now every template can use:

html
<footer>
  <p>&copy; {{ year }} {{ site_name }}</p>
</footer>
html
<footer>
  <p>&copy; {{ year }} {{ site_name }}</p>
</footer>

Best practice

Keep context processors small.

Don’t put heavy database queries in them.

If you need navigation loaded from DB, consider caching.

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