[Zope] Zope Permissions

[Katrin]

hi everybody!

i have a little problem with permission settings.

i'm writing a product in python. the product installs dtml methods when
installed in a folder. now i want zope to ask for the user name and the
password when a certain page is rendered as an URL (zope doesn't have a
user name yet).

i found out that in order to get the zope login window, i have to
uncheck the view permission of the page (i mean the checkbox for acquire
permission settings). how can i uncheck the box using python in my
product? or how can i delete the view permission for this page in my
product?

i hope someone's able to help me here.

thanks in advance,
katrin