Lazy Imports Land in Python and Other Python News for December 2025 - Real Python
Python 3.15 advances with alpha releases, UTF-8 default, new profiling and C APIs; PEP 810 accepted for explicit lazy imports; Windows installer manager updated.
FastAPI renders Jinja2 templates to serve dynamic HTML sites; Python ecosystem updates include a Floodfill tutorial, Django's 20th anniversary, and Python 3.15 alpha.
TypedDict now controls both key requiredness and whether extra keys are allowed, with Python 3.15 adding closed TypedDict behavior to restrict unknown keys.