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Re: Spreading a class over multiple files

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On 6/5/2016 2:55 AM, Mark Summerfield wrote:
> Sometimes I want to spread a class over multiple files.

My experience with trying to work with two do-all classes in idlelib has 
engendered a dislike for such.  It is hard to find things in a 
kitchen-sink class.  To switch IDLE from being a multi-window 
application to having multiple panes in a single window, both must be 
refactored.

> My primary use case is when I create a "Model" class to reflect an
> entire SQL database. I want a model instance to provide a single
> point of access to the database, but the database has many tables
> each requiring its own methods since they differ in their structure,
> purpose, validation needs, etc.

I would consider a master database ('Model') class, a base table class, 
and a subclass class for each table or group of similar tables.

> A secondary use case is when I create "MainWindow" classes in GUI
> programming and have lots of methods to reflect all the actions
> (e.g., menu options and toolbar actions, plus interaction with the
> main widget(s)).

With tk and tkinter, at least, implementation functions do not have to 
be in the same file as the menu or toolbar definitions.

-- 
Terry Jan Reedy

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Thread

Spreading a class over multiple files Mark Summerfield <list@qtrac.plus.com> - 2016-06-04 23:55 -0700
  Re: Spreading a class over multiple files Gary Herron <gherron@digipen.edu> - 2016-06-05 00:18 -0700
    Re: Spreading a class over multiple files Mark Summerfield <list@qtrac.plus.com> - 2016-06-05 01:14 -0700
      Re: Spreading a class over multiple files Steven D'Aprano <steve@pearwood.info> - 2016-06-05 20:57 +1000
  Re: Spreading a class over multiple files Peter Otten <__peter__@web.de> - 2016-06-05 09:40 +0200
  Re: Spreading a class over multiple files Terry Reedy <tjreedy@udel.edu> - 2016-06-05 13:59 -0400

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