Python’s new frozendict type Only rarely do new types get added to Python. With Python 3.15, the dictionary type now has an immutable counterpart, the “frozendict”. With it, you can use a dictionary ...

April 6, 2026 • Lots of people count on helium. From MRI machines and semiconductor manufacturing to pressurizing rockets and detecting leaks, helium is used globally for much more than party balloons ...