[Python-Dev] Re: [Python-checkins] python/dist/src/Doc/lib libfuncs.tex,1.134,1.135

2003年6月12日 15:02:02 +1200 (NZST)

> - bool() called without arguments now returns False rather than
> raising an exception. This is consistent with calling the
> constructors for the other builtin types -- called without argument
> they all return the false value of that type. (SF patch #724135)

That's clearly useful for mutable types such as lists
and dicts, but for immutable types? Especially one such
as bool whose possible values are so, er, symmetrical
in prominence (is there a succinct word for this
concept?)
Does anyone have a use case for this?
Greg Ewing, Computer Science Dept, +--------------------------------------+
University of Canterbury,	 | A citizen of NewZealandCorp, a	 |
Christchurch, New Zealand	 | wholly-owned subsidiary of USA Inc. |
greg@cosc.canterbury.ac.nz	 +--------------------------------------+