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Groups > comp.lang.python > #32412
| From | Terry Reedy <tjreedy@udel.edu> |
|---|---|
| Subject | Re: Immutability and Python |
| Date | 2012-10-29 14:03 -0400 |
| References | <CAF_E5Jbf0KJjDLV0jS-p_J9E4D8=_sPScgE+vkmkN2sMw=3aoA@mail.gmail.com> <1793477354.3492917.1351526431192.JavaMail.root@sequans.com> <mailman.3025.1351527152.27098.python-list@python.org> <7x625t6xaj.fsf@ruckus.brouhaha.com> <CAF_E5Ja0TM80-HT9BU46GJOmVue3JZpijVGsC483NdCn4ngU_A@mail.gmail.com> |
| Newsgroups | comp.lang.python |
| Message-ID | <mailman.3039.1351533862.27098.python-list@python.org> (permalink) |
On 10/29/2012 1:05 PM, andrea crotti wrote: > I meant how do I create new immutables classes myself, I guess that's > possible writing C extensions but I don't see in pure Python.. If you mean class with immutable instances, mutate new instances in __new__ instead of __init__ and write a custom .__setattr__ that prevents changes thereafter. If you want the class itself to be immutable (after creation), write a custom metaclass. You may also need to think about .__getattribute__, but I never studied the detail completely and have forgotten what I learned. -- Terry Jan Reedy
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Re: Immutability and Python andrea crotti <andrea.crotti.0@gmail.com> - 2012-10-29 16:12 +0000
Re: Immutability and Python Paul Rubin <no.email@nospam.invalid> - 2012-10-29 09:46 -0700
Re: Immutability and Python andrea crotti <andrea.crotti.0@gmail.com> - 2012-10-29 17:05 +0000
Re: Immutability and Python Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2012-10-29 22:30 +0000
Re: Immutability and Python Chris Kaynor <ckaynor@zindagigames.com> - 2012-10-29 15:45 -0700
Re: Immutability and Python Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2012-10-29 23:14 +0000
Re: Re: Immutability and Python Evan Driscoll <driscoll@cs.wisc.edu> - 2012-10-29 12:58 -0500
Re: Immutability and Python Terry Reedy <tjreedy@udel.edu> - 2012-10-29 14:03 -0400
Re: Immutability and Python Devin Jeanpierre <jeanpierreda@gmail.com> - 2012-10-29 14:25 -0400
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