[Zope] request forward technique

[prabuddha ray]

>From my login page I'm calling a python script for redirecting it to
seperate pages.
there if login fails i the login page is to be redirected along with
setting a hidden form field 'invalid' by '1'.
For this I've to set the request/form.invalid value so that it is
available to thelogin page.

is it possible to set the request values from a page and return them
back to the same page?

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