On 7/12/2017 7:35 AM, Rhodri James wrote:
On 12/07/17 03:29, Stefan Ram wrote:
Grant Edwards <grant.b.edwa...@gmail.com> writes:
False is required to be a singleton.
»singleton« usually means »the sole object of its class«.
»Ensure a class only has one instance, and provide a
global point of access to it.« - Gamma et al.
type( False )
<class 'bool'>
type( True )
<class 'bool'>
It seems, »False« is not a singleton under the
implementation of Python I used.
The point that was being made is that there are no other bools than True
and False, and they are distinct from the objects 1 and 0.
By analogy with 'singleton', True and False constitute a 'doubleton' in
the sense of being the sole 2 objects of class Bool.
--
Terry Jan Reedy
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