Re: Re: extending PersistentList

On 5/10/16 10:35 PM, Lars van Gemerden wrote:
>
>
> Sequence and its subclass MutableSequence is designed in such a way
> that by implementing the abstract methods (the methods implemented in
> PersistentList2), all other standard list methods (like extend,
> slicing, etc.) follow suit.

Your persistent List2 is a brilliant idea.  You are correct,
understanding and modifying the existing PersistentList class is way way
too complex.  I should know.  I did it.  Your PersistentList2 is so easy
to understand.  Congratulations.

This is part of a larger problem with the Zope Ecosystem.  It was just
not designed to be easy to understand.  Your persistentList2 is very
very easy to understand and modify.  In fact I am going to start using
it.   Is it on github?

I run Blogory.org/zodb The world's largest ZODB directory, part of the
world's largest Python directory.   I really need ordered lists.  I want
to be able to sort the items in order of importance.  The lists never
get very long.  Each of my categories has about 7 items in it.    Why
have I not done this yet?  Not sure.  There were a couple of different
Ordered List Solutions over the years, one by Zope Corporation.  It all
added to confusion.  I was not sure what to do.  Dictionaries were good
enough.
Your approach is easy, I can understand it.  I can modify it.   I will
start using it.

Thanks for the great idea.

Chris
 

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