Re: [matplotlib-devel] units support in svn

[Eric F. <ef...@ha...>]

Fernando Perez wrote:
> On 3/21/07, Eric Firing <ef...@ha...> wrote:
> 
>> Properties would be OK for 2.3; I was thinking we might want to use
>> them.  When a getter and setter already exist, all it takes is the one
>> extra line of code, plus a suitable (unused) name for the property.  I
>> decided not to pursue traits (if at all) until we can use the Enthought
>> package as-is.  But I think that properties could be converted to traits
>> very easily if we wanted to do that in the future, so starting with
>> properties would not be wasted effort.  This is getting a bit off-topic,
>> though.
> 
> Minor note: if you are going to use properties, make sure all classes
> using them are new-style (inherit from object).  With old-style
> classes, properties fail in silent and mysterious ways that may lead
> to much head-scratching.

Not minor at all--I ran into exactly this problem a few months ago with 
my first foray into properties, and it did indeed take quite a bit of 
head-scratching before I realized the problem.  And I am embarrassed to 
say that I had forgotten about it until your reminder above.

Thanks.

Eric