[Zope] Python Class Question

[Hung Jung Lu]

>From: "Daniel G. Rusch" <drusch@globalcrossing.com>
>Thanks, I got the first part working.
>
>Now I am trying to get Zope to find my Chicken.py file. I placed my
>Chicken.py and __init__.py in /lib/python/Shared/DansStuff
>
>I then bounced Zope but it doesn't seem to find my Chicken.py file. I
>say this because if it found it, Zope would compile it into a
>Chicken.pyc file wouldn't it??? The __init__.py isn't compiled either!
>
>Does something special need to be in the __init__.py file?
>...
> > If you are using Zope, you must store your
> > classes where they can be accessed by
> > Python. Usually /lib/python/Shared/Local
> > is a good place, make sure to add the
> > __init__.py file inside the folder. You
> > then refer to the class as Shared.Local.Chicken.

--------------------------------------------------

(1) It should work. I have tested it. Nothing
    special is required for the __init__.py file.

(2) Make sure that you have an __init__.py file
    inside your lib/python/Shared/Local folder.
    This file can be empty. Or you can provide
    some __doc__ and __version__ string like
    Digicool people do. But it really can be
    an empty file.

(3) Inside that folder, create a file Chicken.py,
    which contains the following three lines:

    class Chicken:
        def __init__(self, size):
           self.size = size

(4) This python file will not compile automatically.
    It will only be compiled when it is imported
    by some other Zope modules.

(5) To test what you want: create an external method.
    In the folder Extensions inside your Zope root
    (if you don't have an Extensions folder, you
    have to create one first), create a file Test.py
    containing the following lines:

    import Shared.Local.Chicken

    def getSize(self):
        return self.size

    def test(self):
        Shared.Local.Chicken.Chicken.getSize = getSize
        a = Shared.Local.Chicken.Chicken(123)
        return a.getSize()

(6) Go to Zope management screen. Restart Zope.
    (Or shut it down and restart it manually.)

(7) Create an external method with 'Id' = test,
    'Function name' = test, Python module file = Test
    and click on the 'Edit' button, then click on the
    'OK' button. If you don't know what an external
    method is, you've got bigger problems than I
    thought. :)

(8) Hit the 'Try It' tab.

Done! now you can use the external method inside
your other DTML documents/methods. For instance,
you can have a mytest_dtml method with the following
lines:

<dtml-var standard_html_header>
<dtml-var "test()">
<dtml-var standard_html_footer>

and it will print the number 123 when you view it.

I shouldn't have treated you like a 3-year old.
But I guess making instructions as clearly as
possible eliminates unnecessary confusions. :)
We've all been newbies once.

Hung Jung

______________________________________________________
Get Your Private, Free Email at http://www.hotmail.com