[Yum] Re: passing two or more variables from a python routine.

[Rick Graves]

Robert,

You wrote:

> ... but I don't know how
> to return two variables from one subroutine fragment
in python.
> Probably very simply.


In case no one has addressed this yet, you are right.
(I am just a python newbie, but I know the answer to
that one.)   

In the subroutine, the last line should be like this:

   return Svar1, Svar2

And the call in the calling routine should be:

   Cvar1, Cvar2 = subroutine( args )

BTW, the variables can have exactly the same names in
the calling routine and subroutine, but this is not a
requirement.  So this would be OK in the subroutine:

   return var1, var2

And this would be OK in the calling routine:

   var1, var2 = subroutine( args )

I do not know the limit to the number of variables you
can pass, but it is surely big.  The value coming out
of the subroutine is really a tuple, which is
automatically unpacked in the calling routine.  And
the values coming out can be of different types.  The
number of targets and the number coming out must
match, however.  

I do not know how it could be any more simple than
that!

Rick Graves
(python newbie)


--- yum-request at lists.dulug.duke.edu wrote:


> Message: 5
> Date: Tue, 28 Sep 2004 12:21:56 -0400 (EDT)
> From: "Robert G. Brown" <rgb at phy.duke.edu>
> Subject: [Yum] distribution variable works...
> To: "Yellowdog Updater, Modified"
<yum at lists.dulug.duke.edu>
> Message-ID:
> 
<Pine.LNX.4.44.0409281138170.20382-100000 at lucifer.rgb.private.net>
> Content-Type: TEXT/PLAIN; charset=US-ASCII
> 
> On Tue, 28 Sep 2004, Robert G. Brown wrote:
> 
> The following (2.0.7 derived) config.py actually
works and does the
> substitutions and everything.  It isn't efficient -
both variables 
> could
> be set with one set of rpm.TransactionSet() calls,
but I don't know how
> to return two variables from one subroutine fragment
in python.
> Probably very simply.
> 
>