SQLite async exception with bean-price

[Alen Šiljak]

Hi! Is there a workaround for the async issue with caching, when using bean-price with a custom price source? 

With the cli, it is possible to use `--no-cache` but I've created a custom price source and this is popping up. The issue is registered at https://github.com/beancount/beanprice/issues/91 but no resolution so far. I've seen other price sources, like pricehist, not having this issue, so there must be a way.

I've removed all async code from my price source but that was not the cause.

Thanks for any hints!

[Alen Šiljak]

Martin, thanks for the quick reply to the issue! I've replaced shelve with diskcache and using my custom price source now spits out the results without errors. PR pending.