python question

Scripting Issues
1

let’s say i have a list that contains:(“myvar1”,“myvar2”,“myvar3”)

but i want that those names become a variable themselves.

in php it was not difficult:

$$list[0] = 5;
//that would result into:
$myvar1 = 5;

but how do you do that in python?

MVG,

assainator

2

Something like:

locals()["aaa"] = 5
#Equivalent to:
aaa = 5

To set it as property of other objects (e.g. a class) use setattr:

setattr(self, aaa, 5)
#Or, like this:
self.__dict__["aaa"] = 5
#Equivalent to:
self.aaa = 5

Still, its not a good practice, and if you are in need of this kind of operations it might be good to reconsider your code design.

3

how about:

exec "%s=%d"%(list[0], 5)
4

Because that’s almost the most unsafe code I’ve ever seen. What if the user finds a way to put ‘shutil.rmtree(“c:”)’ in the variable?

5

but assainator ain’t asked for safe code, he asked for a python equivalent of a php piece of code and now he had it :wink:

6

Well, your code isn’t entirely equivalent. The php equivalent to your code would be:

exec("$".$list[0]."=5;");

Also your code is still less safe than the PHP equivalent, while mine is as unsafe as. :slight_smile:

7

mmm, is there a way to point to a variable?
since this is not the most usefull way (as prosoft pointed out)

assainator

8

Well, what about the method in my first post?

9

okay, i’ll try that, i just wanted to see what all options where.

MVG,

assainator

10

Is there some reason you don’t just store the numbers in a list? As in:
myvars[1] = 5

I guess I’m asking for intent here because just looking at the raw syntax doesn’t tell me much. I don’t see why you need a whole bunch of different variables.