cgi behaviouring with key=& url

[Thomas Mangin]

Hi,

Using the module cgi, I send this url of this form :
http://host/cgi-bin/mycgi.cgi?status=enable&pattern=&folder=.

When I do a  cgi.FieldStorage()["pattern"].value this raise an exception as
= is not followed by
anything (I will probably have to add a "" after "pattern=" ).

Can so give me a good raison why the cgi module didn't define any pattern
Minifield with a None value ?

Thomas