cgi integration question 2

[Ken]

"Gerhard Häring" <gerhard.haering at gmx.de> wrote in message
news:slrnar5o1l.162.gerhard.haering at lilith.my-fqdn.de...
> Ken wrote in comp.lang.python:
> > "Gerhard Häring" <gerhard.haering at gmx.de> wrote:
> >> Frankly, sleeping in the context of synchronous IO doesn't make any
> >> sense.
> > Hi, I think my problem here is that the backend program can't output
ontime
> > and I got an empty list in return. Does lines = inf.readlines() actually
> > wait for the backend program to finish execution before proceeding to
> > inf.close() ?
>
> Yes. I believe the backend program closing stdout qualifies, too.
> Anybody else can say for sure?
>
> > I find it very strange that when I compile using python
> > scriptfile.cgi in telnet environment, it works fine, but when I put
> > on the web browser, the list is empty. Do you know how I can fix
> > this problem?
>
> Not without further information. What do the log files of the web
> server tell you? (called /var/log/apache/error.log or similar on
> Apache). Have you tried to enable tracebacks using the cgitb module?,
> e. g.
>
> import cgi, cgitb
> cgitb.enable()
> [rest of your CGI script here]
>
> -- Gerhard

Hi, there isn't such module call cgitb
Traceback (most recent call last):
  File "chessboard.cgi", line 7, in ?
    import os, cgi, cgitb
ImportError: No module named cgitb

The python code is here:
http://www.ug.cs.usyd.edu.au/~keho/comp3204/chessboard.txt and
http://www.ug.cs.usyd.edu.au/~keho/comp3204/chessboard.cgi

The C++ test code is here:
http://www.ug.cs.usyd.edu.au/~keho/comp3204/test02.cc

What did I do wrong to constantly get that broken pipe error?
Traceback (most recent call last): File
"/usr/cs3/keho/lib/html/comp3204/chessboard.cgi", line 143, in ?
outf.close() IOError: [Errno 32] Broken pipe

Thanks