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Groups > comp.lang.python > #58380

Re: zero argument member functions versus properties

References <46d5788e-f081-48d8-b839-f31a0c95bd21@googlegroups.com> <7266a77b-3404-4974-8364-b0cb50ed45a5@googlegroups.com>
From Ian Kelly <ian.g.kelly@gmail.com>
Date 2013-11-03 01:53 -0700
Subject Re: zero argument member functions versus properties
Newsgroups comp.lang.python
Message-ID <mailman.1970.1383468872.18130.python-list@python.org> (permalink)

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On Sun, Nov 3, 2013 at 1:06 AM, Peter Cacioppi <peter.cacioppi@gmail.com> wrote:
> Actually C# is mature enough for this idiom. C# and Python both support getter/setter methods that present as direct attribute access to client code, and thus allow you to refactor the class without breaking backwards compatibility.

It's not as clear-cut as it looks in C#.  Although refactoring the
class in this way doesn't change the API, it does break ABI, which is
significant in an environment where virtually everything is
distributed in binary form.  This happens because a property access
compiled to CIL byte code is transformed into a call to a getter or
setter method, which is a distinct operation from an ordinary
attribute access.  Whereas in Python, an attribute access is just
compiled as an attribute access no matter what the underlying
implementation of that access may end up being at run-time.

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Thread

zero argument member functions versus properties Peter Cacioppi <peter.cacioppi@gmail.com> - 2013-11-02 23:09 -0700
  Re: zero argument member functions versus properties Peter Cacioppi <peter.cacioppi@gmail.com> - 2013-11-02 23:11 -0700
  Re: zero argument member functions versus properties Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2013-11-03 06:52 +0000
  Re: zero argument member functions versus properties Peter Cacioppi <peter.cacioppi@gmail.com> - 2013-11-03 00:19 -0700
  Re: zero argument member functions versus properties Peter Cacioppi <peter.cacioppi@gmail.com> - 2013-11-03 01:06 -0700
    Re: zero argument member functions versus properties Ian Kelly <ian.g.kelly@gmail.com> - 2013-11-03 01:53 -0700
  Re: zero argument member functions versus properties Peter Cacioppi <peter.cacioppi@gmail.com> - 2013-11-03 13:23 -0800
    Re: zero argument member functions versus properties Ian Kelly <ian.g.kelly@gmail.com> - 2013-11-03 19:27 -0700
  Re: zero argument member functions versus properties Peter Cacioppi <peter.cacioppi@gmail.com> - 2013-11-04 15:14 -0800

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