jython: True and False boolean literals?

[davidmichaelkarr@gmail.com]

Aren't there boolean literals for "True" and "False" in Python
(jython)? I can't get "true", "True", "false", or "False" to work. I
ended up having to use "(1==1)" and "(1==0)".

[keirr]

Re: jython: True and False boolean literals?

davidmichaelkar r@gmail.com wrote:[color=blue]
> Aren't there boolean literals for "True" and "False" in Python[/color]
[color=blue][color=green][color=darkred]
>>> True != False[/color][/color][/color]
True[color=blue][color=green][color=darkred]
>>> type(True)[/color][/color][/color]
<type 'bool'>

works for most people :-)

All the best,

Keir

[keirr]

Re: jython: True and False boolean literals?


keirr wrote:[color=blue]
> davidmichaelkar r@gmail.com wrote:[color=green]
> > Aren't there boolean literals for "True" and "False" in Python[/color]
>[color=green][color=darkred]
> >>> True != False[/color][/color]
> True[color=green][color=darkred]
> >>> type(True)[/color][/color]
> <type 'bool'>
>
> works for most people :-)
>[/color]
Ahem, who use python. For jython this looks like[color=blue][color=green][color=darkred]
>>> True != False[/color][/color][/color]
1[color=blue][color=green][color=darkred]
>>> type(True)[/color][/color][/color]
<type 'int'>

Keir.

[Kent Johnson]

Re: jython: True and False boolean literals?

davidmichaelkar r@gmail.com wrote:[color=blue]
> Aren't there boolean literals for "True" and "False" in Python
> (jython)? I can't get "true", "True", "false", or "False" to work. I
> ended up having to use "(1==1)" and "(1==0)".[/color]

No, there are not. Jython implements Python 2.1 which did not have boolean literals. You
can just use 1 and 0.

Kent

[keirr]

Re: jython: True and False boolean literals?

Kent Johnson wrote:[color=blue]
> davidmichaelkar r@gmail.com wrote:[color=green]
> > Aren't there boolean literals for "True" and "False" in Python
> > (jython)? I can't get "true", "True", "false", or "False" to work. I
> > ended up having to use "(1==1)" and "(1==0)".[/color]
>
> No, there are not. Jython implements Python 2.1 which did not have boolean literals. You
> can just use 1 and 0.
>[/color]
The latest jython is 2.2a1 (which does have True and False as ints)

You could declare your own True and False like this:
class Boolean:
__init__(self, value):
self.__value = value
__repr__(self):
return self.__value != 0
__int__(self):
return int(self.__valu e)
and so on.

then, True = Boolean(1)
and False = Boolean(0)

Cheers,
Keir

[Bengt Richter]

Re: jython: True and False boolean literals?

On 22 Dec 2005 10:51:22 -0800, davidmichaelkar r@gmail.com wrote:
[color=blue]
>Aren't there boolean literals for "True" and "False" in Python
>(jython)? I can't get "true", "True", "false", or "False" to work. I
>ended up having to use "(1==1)" and "(1==0)".
>[/color]
You may want to upgrade to a newer version.

Regards,
Bengt Richter