[Tutor] Server Error

[Danny Yoo]

> Actually, the server error shown in my previous mail includes import
> cgitb; cgitb.enable(), thats why I don't understand. Sorry that I didn't
> make myself clear. But still thanks to you.

Ok, I took a look at the problem.  There's an issue around line 90 of your
program:

###
    if email != None:
        Output = Output + "<A HREF="mailto:s4046441 at student.uq.edu.au" + email
        + "">" + name + "</A>.<P>"
###

The class of error here is pure syntax: Python first does a quick pass
through a source file, before execution, to do a "bytecode compile", and
if there are problems at this stage, the system will raise an error, even
before executing a single line in the program.  That's why we're not
seeing cgitb output.

The problem is that Python has no idea that the quotes that you're using
here:

    if email != None:
        Output = Output + "<A HR...
                         ^^^

are any different than the quotes that you're using here:

    if email != None:
        Output = Output + "<A HREF="mailt...
                                  ^^^

Do you see this issue?  If you want to embed a literal double-quote
character in a string literal, you'll need to give advanced warning to
Python.  Sorta like this:

###
>>> message = "he said: \"like this\""
>>> print message
he said: "like this"
###

The backslash character in front is the start of an "escape" sequence to
tell Python to treat the next character as special: we use it so that
Python knows that more string is coming up.

If a single statement spans multiple lines, you may also need to hint at
Python to expect more.  One way to do this is with parentheses:

###
>>> message = ("he said: " +
...            "\"like this\"")
>>> message
'he said: "like this"'
###


If you leave the parens out, Python will think the statement is a run-on
statement, and give an error message since it looks bad:

###
>>> message = "he said: " +
  File "<stdin>", line 1
    message = "he said: " +
                          ^
SyntaxError: invalid syntax
###



Good luck to you!