My app has several different tables, like:
db.gis_layer_openstreetmap_type
db.gis_layer_google_type

I want to be able to do a lookup on these tables by a single line with
subsitution.
Something like:

type="openstreetmap"
for row in db().select(db.gis_layer_%(type)_type.ALL):

I see some examples which suggest that something like this should be
possible but I can't get it to work.
Pointers welcomed - docs seem scarce on this functionality, even in
base Python, let alone Web2Py...

F
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