Dump.cgi
Note that the use of str since the return value of getvalue is can be a String, None, or in the case of a multiple value (for instance with checkboxes), a List.
See the documentation page for the cgi module for all the details.
#!/usr/bin/python
import cgi
fs = cgi.FieldStorage()
print "Content-type: text/html"
print
print "<h1>dump</h1>"
keys = fs.keys()
keys.sort()
print "<dl>"
for i in keys:
print "<dt>" + i + "</dt>"
print "<dd>" + str(fs.getvalue(i)) + "</dd>"
print "</dl>"