[Python-ideas] Add a dict with the attribute access capability
vano at mail.mipt.ru
Thu Nov 30 10:56:56 EST 2017
I use argparse.Namespace whenever I need this.
In reply to Chris Barker's concern of "is this code or is this data",
the last time I used it is when I needed to hold an external function
reference in an object instance (if I assigned it to an attribute, it
was converted into an instance method). It just didn't feel right to
invoke it via a container lookup.
A telling name for the object also clears doubts about what it's
supposed to hold.
On 29.11.2017 11:52, Serhiy Storchaka wrote:
> In 3.7 I have removed an old-deprecated plistlib.Dict.  Actually it
> already was deprecated when the plistlib module was added to the
> regular stdlib in Python 2.6.
> This is a dict subclass which allows to access items as attributes.
> d = plistlib.Dict()
> d['a'] = 1
> assert d.a == 1
> d.b = 2
> assert d['b'] == 2
> Raymond noticed that that capability seemed nice to have.
> What do you think about reviving this type as general purpose type in
> collections or types? Perhaps it can be convenient for working with
> JSON, plists, configuration files, databases and in other cases that
> need a dict with string keys.
> If reintroduce it, there are open questions.
> 1. The name of the type.
> 2. The location of the type. collections or types? Or other variants?
> 3. How it will collaborate with OrderedDict, defaultdict, etc?
> 4. Should it be a dict subclass, or a mixin, or a proxy? Or add
> several types?
>  https://bugs.python.org/issue29196
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