The thing is web2py caching logic is different from what bottlenose wants 
as it never really returns None, it also never really stores values 
directly it calls a function to get a value when it needs one so you need 
to make some kind of adapter for it, you were almost there.

I haven't tested it but this should work.

def reader(cache_url):
    return cache.ram(cache_url, lambda: None, time_expire=None)   # Time 
expire can be any value you want here (e.g 3600 so bottlenose writes it 
again in an hour)


def writer(cache_url, response_text):
    cache.ram(cache_url, lambda: response_text, time_expire=0)   # Time 
expire needs to be 0 here to make sure it always writes


amazon = bottlenose.Amazon(CacheWriter=writer,
                           CacheReader=reader, ....)





-- 
Resources:
- http://web2py.com
- http://web2py.com/book (Documentation)
- http://github.com/web2py/web2py (Source code)
- https://code.google.com/p/web2py/issues/list (Report Issues)
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