List mapping question

[Marc Huffnagle]

I have a number of variables that I want to modify (a bunch of strings 
that I need to convert into ints).  Is there an easy way to do that 
other than saying:

> a = int(a)
> b = int(b)
> c = int(c)
I tried
> [i = int(i) for i in [a, b, c]]
but that didn't work because it was creating a list with the values of 
a, b and c instead of the actual variables themselves, then trying to 
set a string equal to an integer, which it really didn't like.

     Marc
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