setattr inside a module

[kramb64]

I'm trying to use setattr inside a module.
From outside a module it's easy:

import spam
name="hello"
value=1
setattr(spam, name, value)

But if I want to do this inside the module spam itself, what I've to
pass to setattr as first argument?

Thanks a lot for your time.
Marco.

[Denis S. Otkidach]

Re: setattr inside a module

On Wed, 23 Mar 2005 11:35:34 +0100 kramb64 wrote:

K> I'm trying to use setattr inside a module.
K> >From outside a module it's easy:
K>
K> import spam
K> name="hello"
K> value=1
K> setattr(spam, name, value)
K>
K> But if I want to do this inside the module spam itself, what I've to
K> pass to setattr as first argument?

globals()[name] = value

or

setattr(__impor t__(__name__), name, value) # note, circular import here

--
Denis S. Otkidach
http://www.python.ru/ [ru]

[kramb64]

Re: setattr inside a module

On Wed, 23 Mar 2005 11:35:34 +0100, kramb64 <kramb64@hotmai l.com>
wrote:
[color=blue]
>I'm trying to use setattr inside a module.
>From outside a module it's easy:
>
>import spam
>name="hello"
>value=1
>setattr(spam , name, value)
>
>But if I want to do this inside the module spam itself, what I've to
>pass to setattr as first argument?
>
>Thanks a lot for your time.
>Marco.[/color]


I found this:
setattr(__impor t__(__name__), name, value)

But too much underscores.... Nothing better?
Marco.

[Kay Schluehr]

Re: setattr inside a module


kramb64 wrote:[color=blue]
> I'm trying to use setattr inside a module.
> From outside a module it's easy:
>
> import spam
> name="hello"
> value=1
> setattr(spam, name, value)
>
> But if I want to do this inside the module spam itself, what I've to
> pass to setattr as first argument?
>
> Thanks a lot for your time.
> Marco.[/color]

???

Why don't You create 'name' and 'value' as module scoped variables just
by defining them?

If You want to introspect the module within the module, just define

# defined within spam
def introspect():
import spam
print dir(spam)

introspect()

Regards Kay

[Diez B. Roggisch]

Re: setattr inside a module

> I found this:[color=blue]
> setattr(__impor t__(__name__), name, value)
>
> But too much underscores.... Nothing better?
> Marco.[/color]

setattr(sys.mod ules[__name__], name, value)

--
Regards,

Diez B. Roggisch

[Jeremy Bowers]

Re: setattr inside a module

On Wed, 23 Mar 2005 11:35:34 +0100, kramb64 wrote:
[color=blue]
> I'm trying to use setattr inside a module.
> From outside a module it's easy:
>
> import spam
> name="hello"
> value=1
> setattr(spam, name, value)
>
> But if I want to do this inside the module spam itself, what I've to
> pass to setattr as first argument?
>
> Thanks a lot for your time.
> Marco.[/color]

As others point out,

sys.modules[__name__]

I find myself doing this more and more, not less, as I get further into
Python; autogenerating many similar functions, pulling constants from an
external source, stuff like that, usually very meta and every instinct
says its the right thing to do.

Maybe we should have a __module__ attribute that is a reference to the
current module? sys.modules[__name__] is a little obtuse.