It's a soft keyword: https://docs.python.org/3.15/reference/lexical_analysis.html#soft-keywords https://docs.python.org/3.15/reference/lexical_analysis.html...

It's a soft keyword: https://docs.python.org/3.15/reference/lexical_analysis.html#soft-keywords https://docs.python.org/3.15/reference/lexical_analysis.html... > As soft keywords, their use in the grammar is possible while still preserving compatibility with existing code that uses these names as identifier names.