[issue34827] Make argparse.NameSpace iterable

[paul j3]

paul j3  added the comment:

As documented in 
https://docs.python.org/3/library/argparse.html#the-namespace-object

you can create your own 'namespace' class, that does everything you want and 
more.  argparse makes very few assumptions about the object - using getattr, 
setattr, and hasattr where possible.

All that the argparse.Namespace class adds to a plain object is the ability to 
set initial attributes, and to display them in a pretty way.

Look at Namespace.__repr__ to see how it accesses its attributes.

For a function with a

fn(*args, **kwargs)

signature, a namespace 'ns', can be passed in in 2 ways:

   fn(*ns._get_kwargs(), **ns.__dict__)

--
nosy: +paul.j3

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[issue34827] Make argparse.NameSpace iterable

[Serhiy Storchaka]

Serhiy Storchaka  added the comment:

issue8982 is not about making argparse.Namespace iterable, it is about better 
documenting it.

issue8979 was rejected for several reasons which are still valid.

For making **args working, args shouldn't be iterable, it should have the 
keys() method. And this will conflict with the --keys option.

Python is not a JavaScript. Objects and dictionaries are different things here. 
If you want to convert argparse.Namespace to dict, vars(args) is the One 
Obvious Way. It is officially documented.

--
nosy: +serhiy.storchaka
resolution:  -> rejected
stage:  -> resolved
status: open -> closed

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[issue34827] Make argparse.NameSpace iterable

[Micheal Taylor]

New submission from Micheal Taylor :

There was an issue to make argparse.Namespace iterable with a specific intent 
on being able to convert it to a dictionary 
(https://bugs.python.org/issue8982).  Additionally there was another 
improvement request to make it accessible like a dictionary.  
(https://bugs.python.org/issue8979)

While vars(args) and args.thing do accomplish the needs, I'm really lazy, and 
would like the object to be more accessible - for instance, if I will always 
need to access every attribute (because I make a small namespace that fits a 
simple script, making it iterable would be convenient.  It's also more 
convenient to use the typical **thing syntax for passing it into functions if 
all the attributes are required for different things.  This keeps code within 
the functions that would use it simpler, because we no longer need to reference 
args.thing, we can reference thing directly within the function it's been 
passed to.  vars(args) does accomplish this, but it is arguably not as familiar 
for folks as the more "familiar" syntax of **args.

--
components: Library (Lib)
messages: 326605
nosy: bubthegreat
priority: normal
severity: normal
status: open
title: Make argparse.NameSpace iterable
versions: Python 3.6

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