builtins
HoldTools
Python's built-in namespace containing names available by default at runtime.
Why it's here
Placed in Hold: 1 article(s) of evidence from 1 source(s), led by research-stage coverage, with 0 in the last 30 days. Confidence 24%. Low accumulated evidence, so it defaults conservatively pending more signal.
Evidence (1)
- 2Hacker News·8/25/2026researchPython's built-in constants behave inconsistently
The post examines six pre-declared Python constants—True, False, None, __debug__, Ellipsis, and NotImplemented—and notes that they are implemented in different ways. It highlights unusual behavior such as True/False/None being keywords, __debug__ being a special assignable identifier that cannot be reassigned, and Ellipsis/NotImplemented remaining ordinary builtins that can be shadowed.