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Date: Tue, 16 Jun 2015 12:00:43 +0200
From: Jonas Wielicki <jonas@wielicki.name>
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To: python-list@python.org
Subject: Re: Set a flag on the function or a global?
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On 16.06.2015 01:57, Steven D'Aprano wrote:
> Alternatively, I can use a flag set on the function object itself:
> 
> edir.dunders = False
> 
> 
> Naturally you can always override the default by explicitly
> specifying a keyword argument edir(obj, dunders=flag).
> 
> Thoughts and feedback? Please vote: a module global, or a flag on
> the object? Please give reasons, and remember that the function is
> intended for interactive use.

I like a flag on the object, and this would be my implementation:

```
def edir_impl():
    # implementation of edir
    pass

class Edir(object):
    def __init__(self):
        self.kwargs = {}

    def __getattr__(self, name):
        return self.kwargs[name]

    def __setattr__(self, name, value):
        self.kwargs[name] = value

    def __delattr__(self, name):
        del self.kwargs[name]

    def __call__(self, *args, **kwargs):
        kwargs_to_use = self.kwargs.copy()
        kwargs_to_use.update(kwargs)
        edir_impl(*args, **kwargs_to_use)

edir = Edir()
```
(untested, but you get the idea, hopefully)

This also allows to have several versions of edir around in a shell
with different default settings.

regards,
jwi
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