[albatross-users] pagination with al-for

[Matt Goodall]

Andrew McNamara wrote:

[snip]

>>There have been a couple of suggestions for how to fix the problem:
>>
>>  1. Hack the import machinery. Instead of importing page modules as
>>     is, concoct a package and module name to avoid clashes. I think I
>>     found a problem with this approach (something to do with importing
>>     builtin packages like os and os.path) but I can't remember the
>>     details now. I think I also found a way to avoid the problem.
>>    
>>
>
>I've done this before - I don't remember running into any real problems.
>I've discarded my earlier implementation, but here's something I just
>knocked up - it appears to work as desired:
>
>    import imp, sys
>
>    mod_holder_name = '__snot__'
>
>    def load_page_module(path, name):
>        try:
>            mod_holder = sys.modules[mod_holder_name]
>        except KeyError:
>            mod_holder = imp.new_module(mod_holder_name)
>            sys.modules[mod_holder_name] = mod_holder
>            globals()[mod_holder_name] = mod_holder
>
>        f, path, desc = imp.find_module(name, [path])
>        try:
>            abs_name = mod_holder_name + '.' + name
>            mod = imp.load_module(abs_name, f, path, desc)
>            setattr(mod_holder, name, mod)
>        finally:
>            f.close()
>
>    >>> load_page_module('.', 't')
>    >>> __snot__.t.Sigh
>    'Hi'
>
>I've played around loading stuff from the "page" module t.py, and various
>other things, and it just seems to work. It's probably not necessary or
>desirable to poke everything back into globals() in the context of the
>Albatross machinery.
>
>Can anyone see any problems with this scheme?
>  
>

Ah yes, now I remember what the problem was.

My initial experiment with this built a "flat" module name such as 
__albatross_pages__one_two. The fix was to create a holding module, 
__albatross_pages__, to hold the page modules ... just like you've done 
above.

I don't think my code was as neat as yours though, and the name of your 
holding module is much better ;-).

Matt

-- 
Matt Goodall, Pollenation Internet Ltd
w: http://www.pollenation.net
e: matt at pollenation.net