[Python-Dev] Re: Re: lists v. tuples

[Greg Ewing]

> Yes, I know that -1 is a valid truth value.
> 
> So the first time you care is the first time f(x, y) returns nonzero.
> Now you can find out what kind of function f is by calling f(y, x).
> If f(y, x) returns zero, f is <.  Otherwise, it's a 3-way comparison.

I think the worry is that the function might be saying
"true" to both of these, but just happen to spell it
1 the first time and -1 the second.

Probably fairly unlikely, though...

Greg Ewing, Computer Science Dept, +--------------------------------------+
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