Hello.
I have implemented an Hstore array type converter for psycopg2.
I thought it may be of interest to you, even if I'm afraid I may have
forgotten things in my implementation.
You can look at the patch here:
https://github.com/Kozea/psycopg/commit/60fd7ecf833f1e56a41cca7b5700dea2add75091
Regards,
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Ronan Dunklau