FIXED: Dynamically reference variables in object

[Ben Collier]

Hi all,

I know that I can dynamically reference a variable with locals()["i"], for instance, but I'd like to know how to do this with a variable in an object.

If I have an object called "device", with variables called attr1, attr2 .. attr50, how could I dynamically reference these?

It's fairly academic, but I'd like to avoid code duplication.

Thanks,

Ben

 

[Antoon Pardon]

Hi all,

I know that I can dynamically reference a variable with locals()["i"], for instance, but I'd like to know how to do this with a variable in an object.

If I have an object called "device", with variables called attr1, attr2 .. attr50, how could I dynamically reference these?

It's fairly academic, but I'd like to avoid code duplication.

Thanks,

Ben

It looks like you are asking for getattr. getattr(device, "attr1"). However unless you have
specific reasons to use atrributes (what you seem to call variables here), it seems you are
better of using a dictionary. So you could then use: device["attr1"].

 

[Chris Angelico]

I know that I can dynamically reference a variable with locals()["i"], for instance, but I'd like to know how to do this with a variable in an object.

If I have an object called "device", with variables called attr1, attr2 .. attr50, how could I dynamically reference these?

It's fairly academic, but I'd like to avoid code duplication.

Check out the getattr function:

http://docs.python.org/3.5/library/functions.html#getattr

But if you're doing that sort of thing, you may want to consider using
a dictionary instead.

ChrisA