[Zope] Using Python Script as module?

Hello, I try to define some helper functions inside of a `Python Script` (PS). Simplified example: # def fa(): print 'fa executed' def fb(): fa() fb() return printed # This does not work, as the PS itself is apparently not a module level namespace. I can call fa() directly, although. Is there some way to call a function defined in the PS inside another function? Is there something like the PS namespace? TIA, __Janko