"Variable variable name" or "variable lvalue"

inmmike at gmail.com inmmike at gmail.com
Sun Aug 19 18:39:43 CEST 2007


On Aug 15, 1:42 pm, mfglinux <mfgli... at gmail.com> wrote:
> Hello to everybody
>
> I would like to know how to declare in python a "variable name" that
> it is in turn a variable
> In bash shell I would wrote sthg like:
>
> for x in `seq 1 3`
> do
>   M$i=Material(x)  #Material is a python class
> done
>
> Why I need this? Cause I have a python module that obliges me to build
> a variable called Period, which should have a variable name of
> summands (depends on the value of x)
>
> #Let's say x=3, then Period definition is
> Period=Slab(Material1(12.5)+Material2(25)+Material3(12.5)) #Slab is a
> python class
>
> I dont know how to automatize last piece of code for any x
>
> thank you
>
> Marcos

Regardless of whether or not this is a "best practice" sometimes it is
necessary. For example, I am looping through a dictionary to set some
class properties. Anyway, here is what I finally came up with:

exec "self.%s = '%s'" % (item, plist[item])

A more simple example for setting a variable outside of a class...

exec '%s = '%s'" % ('variableName', 'variable value')

Cheers!
Mike




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