PEP 285: Adding a bool type

[Lulu of the Lotus-Eaters]

|the Lotus-Eaters wrote:
|>    fs = (can_be_moved, can_be_sized, can_be_stacked,
|>          can_be_coloured, can_be_hidden)
|>    major = len([1 for f in fs if f(o)]))

|from operators impor add
|fs = ...
|major = reduce(add, [f(o) for f in fs])

Well... my version is two bytes shorter :-) (more if you count the extra
import).

The real problem, however, with Magnus' version is that if the functions
return some overloaded true value rather than nice 0/1 booleans, his
doesn't work.  I started to try to do a reduce() version, but then felt
like I would have needed a filter() or map() to get cannonical 0/1
values.  My len() version handles functions that might return
empty/non-empty lists, other integers, etc.

Yours, Lulu...

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