[Zope-dev] Zope Product Reload

[Andrew Lahser]

I understand its possible to reload a module with python. 
Theoretically, it should be possible to reload a Zope Product 
without restarting Zope.

I would like to develop a Product/Patch/External Method that 
would allow this. After a couple hours of research, I have
more questions than answers. If anyone has looked at this,
I would appreciate some insight.

Here are a few questions.

1. It appears that Zope puts in its own __import__ and reload
hooks, is this correct? Why does Zope do this?
2. Just setting up a simple method, such as the following
doesn't work either. 

import Products
from CStringIO import StringIO

def manage_reload(self, product_name, REQUEST=None):
    """Reload a Product without restarting Zope"""
    if hasattr(Products, product_name):
        product=getattr(Products,product_name)
    else:
        return 'Product not found'
    modules=sys.modules
    try:
        reload(product)
    except:
        f=StringIO()
        traceback.print_exc(100,f)
        f=f.getvalue()
        try: modules[pname].__import_error__=f
        except: pass

The strange thing about this method is that the module DOES
get reloaded, but the new module doesn't appear to get used.

Very puzzling!

Mostly, I am wondering if anyone else has tried or thought
about this problem. Developing products can take many, many
iterations, and I am just tired of waiting the three or four
seconds for Zope to restart.

Drew