Got it fixed. Thanks y'all. Regards, ------Original Message------ From: Dave Angel To: Dipo Elegbede Cc: tutor Subject: Re: [Tutor] cgi help Sent: Oct 6, 2010 12:30
On 2:59 PM, Dipo Elegbede wrote: > here is the code: > > http://pastebin.com/K2Fxq6ac > > kindly help me figure out my mistake. > > It is supposed to return a table of environmental variables but it returns > only the header and a blank page. > > thanks > Care to define "return" ? How are you running this code? How are you trapping and displaying the exception it gets when run? Can you show us the traceback? Are you looking at the output in a web browser? Which one? And are you doing a view-Source, or whatever your browser offers? A CGI program is intended to run on a web server, and debugging it can be very difficult. Are you sure you want this as a beginner project? If so, then I'd start by saying you should run it locally, till you get rid of all the errors you'll see that way. By inspection, I can see that you should get more than the header, you should also get the <table> element, then it'll crash on the bogus assignment of the uninitialized variable rowNumber. When I run it locally, I get: Content-type: text/html <?xml version = "1.0" encoding = "UTF-8"?> <! DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "DTD/xhtml1-strict.dtd"> <html xmlns = "http://www.w3.org/1999/xhtml";> <head><title>Environmental Variables</title></head> <body> <table style = "border: 0"> Traceback (most recent call last): File "M:\cgitest.py", line 27, in <module> rowNumber += 1 NameError: name 'rowNumber' is not defined You don't initialize the global variable rowNumber to anything, but just increment it. You do initialize a local variable in your function with the same name, but nothing is ever done with that, and of course it goes away when the function ends. Same with the backgroundColor local. To fix this problem you'll need to initialize rowNumber before the for statement. DaveA Sent from my BlackBerry wireless device from MTN _______________________________________________ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
