Re: using min and max with float

I know that this is trivial, but here's some code:

class Float(FancyValidator):

    """Convert a value to a float.

    Example::

        >>> Float.to_python('10')
        10.0
        >>> Float.to_python('ten')
        Traceback (most recent call last):
            ...
        Invalid: Please enter a float value
        >>> Float(min=0).to_python('-1')
        Traceback (most recent call last):
            ...
        Invalid: Please enter a float >= 0.0
        >>> Float(max=0).to_python('1')
        Traceback (most recent call last):
            ...
        Invalid: Please enter a float <= 0.0

    """

    messages = {
        'float': "Please enter a float value",
        'tooLow': "Please enter a float >= %(min)s",
        'tooHigh': "Please enter a float <= %(max)s"
    }

    min = None
    max = None

    def __initargs__(self, args):
        if self.min != None:
            self.min = float(self.min)
        if self.max != None:
            self.max = float(self.max)

    def _to_python(self, value, state):
        try:
            return float(value)
        except (ValueError, TypeError):
            raise Invalid(self.message('float', state), value, state)

    def validate_python(self, value, state):
        if self.min != None and value < self.min:
            msg = self.message("tooLow", state, min=self.min)
            raise Invalid(msg, value, state)
        if self.max != None and value > self.max:
            msg = self.message("tooHigh", state, max=self.max)
            raise Invalid(msg, value, state)

    _from_python = _to_python

Of course, now there's overlap between the Number and Float
validators.  Hence, feel free to ignore this code.  I just needed it
;)

Best Regards,
-jj

On Wed, Apr 30, 2008 at 10:57 PM, Shannon -jj Behrens <[email protected]> wrote:
> I'm looking at the source, and I see that the Int validator can check
>  that the int is within min and max, but the Number validator can't.
>  Is there an easy way to check that the user has given me a Float in
>  the range [0, 1]?
>
>  Thanks,
>  -jj
>
>  --
>  I, for one, welcome our new Facebook overlords!
>  http://jjinux.blogspot.com/

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