you can't concatenate an integer and a string. Make sense, but it's a pain for someone that's used to doing a lot of perl/shell type scripting.
if you try something like this:
cntr=1you're going to get an error similar to:
print "counter is " +cntr
TypeError: __add__ nor __radd__ defined for these operands
So how do you do this? It's almost too easy:
print "counter is " +cntr.toString()