This has been applied, r3416
Shannon -jj Behrens wrote:
> On Fri, May 2, 2008 at 8:30 AM, Ian Bicking <ianb@???> wrote:
>> Re: Range -- perhaps that could be an abstract base class for Float and Int?
>
> Yes, that's an excellent idea. Duh ;)
>
> My style is just slightly different than yours, but here's the code
> with doctests and all:
>
> class RangeValidator(FancyValidator):
>
> """This is an abstract base class for Int and Number.
>
> It verifies that a value is within range. It accepts min and max
> values in the constructor.
>
> (Since this is an abstract base class, the tests are in Int and
> Number.)
>
> """
>
> messages = {
> 'tooLow': _("Please enter a number that is %(min)s or greater"),
> 'tooHigh': _("Please enter a number that is %(max)s or smaller"),
> }
>
> min = None
> max = None
>
> def validate_python(self, value, state):
>
> # There's some duplicated code here, but it's a lot more
> # readable than the alternative.
>
> if self.min is not None:
> if value < self.min:
> msg = self.message("tooLow", state, min=self.min)
> raise Invalid(msg, value, state)
> if self.max is not None:
> if value > self.max:
> msg = self.message("tooHigh", state, max=self.max)
> raise Invalid(msg, value, state)
>
>
> class Int(RangeValidator):
>
> """Convert a value to an integer.
>
> Example::
>
> >>> Int.to_python('10')
> 10
> >>> Int.to_python('ten')
> Traceback (most recent call last):
> ...
> Invalid: Please enter an integer value
> >>> Int(min=5).to_python('6')
> 6
> >>> Int(max=10).to_python('11')
> Traceback (most recent call last):
> ...
> Invalid: Please enter a number that is 10 or smaller
>
> """
>
> messages = {
> 'integer': _("Please enter an integer value")
> }
>
> def _to_python(self, value, state):
> try:
> return int(value)
> except (ValueError, TypeError):
> raise Invalid(self.message('integer', state),
> value, state)
>
> _from_python = _to_python
>
>
> class Number(RangeValidator):
>
> """Convert a value to a float or integer.
>
> Tries to convert it to an integer if no information is lost.
>
> Example::
>
> >>> Number.to_python('10')
> 10
> >>> Number.to_python('10.5')
> 10.5
> >>> Number.to_python('ten')
> Traceback (most recent call last):
> ...
> Invalid: Please enter a number
> >>> Number(min=5).to_python('6.5')
> 6.5
> >>> Number(max=10.5).to_python('11.5')
> Traceback (most recent call last):
> ...
> Invalid: Please enter a number that is 10.5 or smaller
>
> """
>
> messages = {
> 'number': _("Please enter a number")
> }
>
> def _to_python(self, value, state):
> try:
> value = float(value)
> if value == int(value):
> return int(value)
> return value
> except ValueError:
> raise Invalid(self.message('number', state),
> value, state)
>
> Best Regards,
> -jj
>
--
Ian Bicking : ianb@??? : http://blog.ianbicking.org
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