On 2023-04-14 10:19:03 +1000, Chris Angelico wrote: > The entire Presentation Manager and Workplace Shell (broadly > equivalent to a Linux "desktop manager", I think? Kinda?) were object > oriented; you would have a WPDataFile for every, well, data file, but > some of those might be subclasses of WPDataFile. And it was fairly > straight-forward to write your own subclass of WPDataFile, and there > was an API to say "if you would ever create a WPDataFile, instead > create one of my class instead". This brilliant technique allowed > anyone to enhance the desktop in any way, quite impressive especially > for its time. I've yearned for that ever since, in various systems, > although I'm aware that it would make quite a mess of Python if you > could say "class EnhancedInt(int): ..." and then "any time you would > create an int, create an EnhancedInt instead". A bit tricky to > implement.
Or alternatively you might be able to add or replace methods on the
existing int class. So 5 is still just an int, but now (5 + "x") calls
the modified __add__ method which knows how add a string to an int.
Might make even more of a mess ;-).
hp
--
_ | Peter J. Holzer | Story must make more sense than reality.
|_|_) | |
| | | h...@hjp.at | -- Charles Stross, "Creative writing
__/ | http://www.hjp.at/ | challenge!"
signature.asc
Description: PGP signature
-- https://mail.python.org/mailman/listinfo/python-list
