[Python-Dev] ANN: PEP 335: Overloadable Boolean Operators

Greg Ewing greg at cosc.canterbury.ac.nz
Mon Sep 13 05:05:26 CEST 2004

> I like the PEP with 'and' and 'or', but isn't the 'not' special method
> essentially the inverse of __nonzero__?

No, because:

(1) __nonzero__ is restricted to returning a boolean result.

(2) There are other contexts besides 'not' in which __nonzero__
    gets called.

Greg Ewing, Computer Science Dept, +--------------------------------------+
University of Canterbury,	   | A citizen of NewZealandCorp, a	  |
Christchurch, New Zealand	   | wholly-owned subsidiary of USA Inc.  |
greg at cosc.canterbury.ac.nz	   +--------------------------------------+

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