> "for" loop as you suggest, the program won't enter the loop unless > "s" is initialized so that it's in "input". How do I do that?
for s in input: means that s takes on each value in input. input is your file. Thus s takes on the value of each line in the input file. You don't need to initialise s before entering the loop as you would with a while loop. Similarly you don't need to test for the end of the file, 'for' does all that too. Take a look at the 'Loops' topic and then the 'Handling Files' topic in my tutorial for more info on this. > Also, near the end of your remarks you say that the code at the > bottom of my program doesn't do anything. It does for me. Lets take a look: >>> print N >>> for i in range(N): >>> T[i] <-------- This does nothing >>> print T[i] The line that simply has the value in it will not do anything. It will not print out the value, you need to call print for that to happen. > put in those print statements to verify that the contents of those > variables are what I expected them to be. That's all that mess is > for. The debug/test print statements are fine, I was only pointing out that one line did nothing, not the entire block. HTH, Alan G Author of the Learn to Program web tutor http://www.freenetpages.co.uk/hp/alan.gauld _______________________________________________ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor