Cannot get the value from dogpile.cache from different modules.

[xeon Mailinglist]

On Tuesday, December 29, 2015 at 5:38:17 PM UTC, xeon Mailinglist wrote:
> On Tuesday, December 29, 2015 at 5:33:43 PM UTC, Peter Otten wrote:
> > xeon Mailinglist wrote:
> > 
> > > On Tuesday, December 29, 2015 at 4:18:10 PM UTC, Peter Otten wrote:
> > >> xeon Mailinglist wrote:
> > >> 
> > >> > On Tuesday, December 29, 2015 at 11:16:10 AM UTC, xeon Mailinglist
> > >> > wrote:
> > >> >> 1. How do I create a global variable that can be accessed by all
> > >> >> classes?
> > >> >> 
> > >> >> 2. I am using `dogpile.cache` to store data in the cache [1], but if I
> > >> >> set and get the same key from different modules, I don't get the
> > >> >> value. Here is an example in [2]. The value than I get is
> > >> >> `NO_VALUE.NO_VALUE`. Why this happens?
> > >> 
> > >> >>     region = make_region().configure('dogpile.cache.memory')
> > >> 
> > >> The memory backend wraps a python dict whose contents are only available
> > >> to a single script and forgotten when that script ends.
> > >> 
> > >> My crystal ball tells me that you want to communicate between processes
> > >> rather than "modules" and need a backend that implements persistence.
> > >> "dogpile.cache.file" seems to be the one without dependencies outside the
> > >> standard library.
> > > 
> > > 
> > > No. 
> > 
> > Does "No" mean "I have run my code with another backend, and the modified 
> > script showed the same behaviour"?
> > 
> > > My problem is that I have method1() that calls method2() which calls
> > > myset(). method1() -> method2() -> myset(5). My problem is that, if I try
> > > to get the value of myset() inside method1(), I can't have it. It seems
> > > that the program has lost the value.
> > 
> > I can't make sense of that. You should be able to nest methods to your 
> > heart's content (as long as you don't reach the recursion limit).
> > 
> > Can you post minimal versions of your modules in such a way that I can 
> > easily run them over here? 
> > 
> > If you have only one process you probably have somehow managed to get two 
> > backend dicts. Unfortunately there's a blind spot on my crystal ball, and I 
> > can't see how exactly you did it...
> 
> No, I cannot get a simpler example. The simpler example works, and in my code, it doesn't. I thought that it was something related to the variable `region`, but I declare it as global. So, I think that all the sets will go to the same variable.

Strangely enough, when I put the set values in the method1(), it works ok. Is it because method2() is in a submodule of method1?