Script error

[Petter Larsen]

Hello!

I'am trying to get this guestbook script to work, but I get some errors I
don't understand.
Can someone please help me??

guestbook.py
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-------------
import sys
sys.path.append('/usr/lib/python2.2')
import string, re, cgi, os

def ObsceneLanguage(usestring):
   usestring=string.upper(usestring)
   obscene="blast","sugar"
   for useword in obscene:
      if string.find(usestring, string.upper(useword))<>-1:
         return (1)
   return (0)


#usebody=open("guestbook.txt", "r")        # Open main guestbook textfile
#usehead=open("guestbook-head.htm", "r")   # Open guestbook HTML header
#usefoot=open("guestbook-foot.htm", "r")   # Open guestbook HTML footer

if os.environ["QUERY_STRING"] == "post":  # Performs the guestbook POST
   useform=cgi.FieldStorage()
   try:
      realname= useform["REALNAME"].value
   except:
      realname=""
   try:
      email= useform["EMAIL"].value
   except:
      email=""
   try:
      location=useform["LOCATION"].value
   except:
      location=""
   try:
      comments=useform["COMMENTS"].value
   except:
      comments=""
   comments=string.replace(comments, "\n", "<BR>");
   print "Content-type: text/html"
   print
   print usehead.read()

   if realname=="":
      print "You have not entered a name/nickname"
      print usefoot.read()
      sys.exit(0)
   elif comments=="":
      print "You have not entered a comment"
      print usefoot.read()
      sys.exit(0)

   if (ObsceneLanguage(realname)==1) or (ObsceneLanguage(email)==1) or
(ObsceneLanguage(email)==1) or (ObsceneLanguage(location)==1) or
(ObsceneLanguage(comments)==1):
      print "You have entered something that would seem offensive.  Please
press the back button to edit your text and resubmit."
      print usefoot.read()
      sys.exit(0)
   n=now.now()

   memBody=usebody.readlines()

   memBody.insert(0,
realname+"||"+email+"||"+location+"||"+comments+"||"+str(n.day)+"/"+str(n.mo
nth)+"/"+str(n.year)+"\n")
   usebody=open("guestbook.txt", "w")
   usebody.writelines(memBody)
   usebody.close
   print "Many thanks for your guest book submission"
   print "<A HREF=\"guestbook.py?view\">Click here</A> to view the guest
book"
else:
   print "Content-type: text/html"
   try:
      print
      print usehead.read()
      bodyuse=usebody.readlines()
      for useline in bodyuse:
         usesplit=string.split(useline, '||')
         print
         print "<CENTER><TABLE width=\"100%\">"
         print "<TR><TD align=right width=80><FONT
SIZE=\"-1\"><B>Name:</B></TD></FONT><TD><FONT SIZE=\"-1\"><A
HREF=\"mailto:"+usesplit[1]+"\">"+usesplit[0]+"</A></FONT></TD></TR>"
         print "<TR><TD align=right width=80><FONT
SIZE=\"-1\"><B>Date:</B></TD></FONT><TD><FONT
SIZE=\"-1\">"+usesplit[4]+"</FONT></TD></TR>"
         print "<TR><TD align=right width=80><FONT
SIZE=\"-1\"><B>Location:</B></FONT></TD><TD><FONT
SIZE=\"-1\">"+usesplit[2]+"</FONT></TD></TR>"
         print "<TR><TD ALIGN=RIGHT width=80><FONT
SIZE=\"-1\"><B>Comments:</B></FONT></TD><TD BGCOLOR=\"#FFFFCC\"><FONT
SIZE=\"-1\">"+usesplit[3]+"</FONT></TD></TR>"
         print "</TABLE></CENTER>"
         print "<HR><P>"
      print usefoot.read()
      usehead.close();
      usefoot.close();
   except:
      print "SORRY AN ERROR HAS OCCURRED"



Get the following error message:
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-------------------
Traceback (most recent call last):
  File "guestbook.py", line 28, in ?
    if os.environ["QUERY_STRING"] == "post":  # Performs the guestbook POST
  File "/usr/lib/python2.2/UserDict.py", line 14, in __getitem__
    def __getitem__(self, key): return self.data[key]
KeyError: QUERY_STRING



Best regards:
Petter Larsen