Late-bound argument defaults for Python
Late-bound argument defaults for Python
[Development] Posted Nov 10, 2021 17:26 UTC (Wed) by jake
Python supports default values for arguments to functions, but those defaults are evaluated at function-definition time. A proposal to add defaults that are evaluated when the function is called has been discussed at some length on the python-ideas mailing list. The idea came about, in part, due to yet another resurrection of the proposal for None-aware operators in Python. Late-bound defaults would help with one use case for those operators, but there are other, stronger reasons to consider their addition to the language.