Re: [matplotlib-devel] empty date formatter unit tests

On Sun, Sep 20, 2009 at 9:35 PM, John Hunter <jd...@gm...> wrote:

> where myInstance is an object of the type you expect to pass in.  As
> long as you have registered a converter from type(myInstance) ->
> ConversionInterface, you can now specify the default limits through
> the ConversionInterface.default_limits method::
>
>    @staticmethod
>    def default_units(x, axis):
>        'return the default unit for x or None for the given axis'
>        return None

This is a typo: I should be referring to the default_limits attribute
of AxisInfo.  Instead, I pasted in the default_units method of the
conversion interface

> As an example in matplotlib.dates, we choose an arbitrary interval,
> which while arbitrary avoids the 0..1 problem we have been having::
>
> class DateConverter(units.ConversionInterface):
>    """The units are equivalent to the timezone."""
>
>    @staticmethod
>    def axisinfo(unit, axis):
>        'return the unit AxisInfo'
>        # make sure that the axis does not start at 0
>
>        majloc = AutoDateLocator(tz=unit)
>        majfmt = AutoDateFormatter(majloc, tz=unit)
>        datemin = datetime.date(2000, 1, 1)
>        datemax = datetime.date(2010, 1, 1)
>
>        return units.AxisInfo( majloc=majloc, majfmt=majfmt, label='',
>                               default_limits=(datemin, datemax))


This is the correct way to specify default_limits

JDH