On Thu, 31 Dec 2015 10:58:17 +1100, Steven D'Aprano wrote:
(some very good information)
Thank you.
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On Wed, 30 Dec 2015 10:51 pm, Charles T. Smith wrote:
> Hi,
>
> How can I get *all* the names of an object's attributes?
In the most general case, you cannot.
Classes can define a __getattr__ method (and a __getattribute__ method, for
new-style classes only) which implement dynamic attributes
On Thu, Dec 31, 2015 at 4:04 AM, Random832 wrote:
> On Wed, Dec 30, 2015, at 07:50, Chris Angelico wrote:
>> I believe that's true, yes. The meaning of "by default" there is that
>> "class X: pass" will make an old-style class. All built-in types are
>> now new-style classes.
>
> To be clear, AFAI
On Wed, Dec 30, 2015, at 07:50, Chris Angelico wrote:
> I believe that's true, yes. The meaning of "by default" there is that
> "class X: pass" will make an old-style class. All built-in types are
> now new-style classes.
To be clear, AFAIK, built-in types were never old-style classes - prior
to t
On Wed, 30 Dec 2015 14:10:14 +, Mark Lawrence wrote:
> On 30/12/2015 11:51, Charles T. Smith wrote:
>> Hi,
>>
>> Does anyone know *why* the __members__ method was deprecated, to be
>> replaced by dir(), which doesn't tell the truth (if only it took an
>> optional parameter to say: "be truthful
On Thu, Dec 31, 2015 at 12:31 AM, Charles T. Smith
wrote:
> Okay, thank you. I'm trying to understand your program.
>
> Unfortunately, I haven't gotten the same output you had, using python 2.6
> or 2.7. Maybe I haven't been able to restore the indentation correctly
> after having been filtered
On 30/12/2015 13:31, Charles T. Smith wrote:
I wonder what the difference is between vars() and items()
Not much. From https://docs.python.org/3/library/functions.html#vars
vars([object])
Return the __dict__ attribute for a module, class, instance, or any
other object with a __dict__
On 30/12/2015 11:51, Charles T. Smith wrote:
Hi,
Does anyone know *why* the __members__ method was deprecated, to be
replaced by dir(), which doesn't tell the truth (if only it took an
optional parameter to say: "be truthful")
https://bugs.python.org/issue456420
https://bugs.python.org/issue44
On Wed, 30 Dec 2015 23:50:03 +1100, Chris Angelico wrote:
> On Wed, Dec 30, 2015 at 11:40 PM, Charles T. Smith
> wrote:
>> Oh!
>>
>> Although the referenced doc says:
>>
>> "For compatibility reasons, classes are still old-style by default."
>>
>> is it true that dictionaries are by default alw
On Wed, Dec 30, 2015 at 11:40 PM, Charles T. Smith
wrote:
> Oh!
>
> Although the referenced doc says:
>
> "For compatibility reasons, classes are still old-style by default."
>
> is it true that dictionaries are by default always new-style objects?
>
> (PDB)c6 = { "abc" : 123, "def" : 456}
>
>
On Wed, 30 Dec 2015 11:51:19 +, Charles T. Smith wrote:
> Hi,
>
> How can I get *all* the names of an object's attributes? I have legacy
> code with mixed new style classes and old style classes and I need to
> write methods which deal with both. That's the immediate problem, but
> I'm alwa
On Wed, Dec 30, 2015 at 11:16 PM, Charles T. Smith
wrote:
> I'm glad I discovered __mro__(), but how can I do the same thing for old-
> style classes?
You should be able to track through __bases__ and use vars() at every level:
>>> class X: pass
...
>>> class Y(X): pass
...
>>> class Z(Y): pass
On Wed, 30 Dec 2015 11:51:19 +, Charles T. Smith wrote:
> Hi,
>
> How can I get *all* the names of an object's attributes? I have legacy
> code with mixed new style classes and old style classes and I need to
> write methods which deal with both. That's the immediate problem, but
> I'm alwa
On Wed, Dec 30, 2015 at 10:51 PM, Charles T. Smith
wrote:
> Does anyone know *why* the __members__ method was deprecated, to be
> replaced by dir(), which doesn't tell the truth (if only it took an
> optional parameter to say: "be truthful")
Does vars() help here? It works on old-style and new-st
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