First, thanks to those who offered answers. They didn't really answer my question, only because I had not worked through the example sufficiently well. Doing this, I believe I understand what is happening, and, if my understanding is correct, have discovered that for other beginning and ending values for the two range statements, the example doesn't work.
Given that the beginning and ending values for the inner range statement are the same, the inner range statement will never be executed for its first iternation; the else will be. This is not correct. Simply make the beginning value a non-prime number, and the program still prints out that that number is prime. Changing both beginning and ending values on the two statements, the ouput is differentially buggy. -- http://mail.python.org/mailman/listinfo/python-list
