On Sep 6, 2011, at 2:48 PM, Michael Bayer wrote: > > On Sep 6, 2011, at 2:38 PM, Mark Erbaugh wrote: > >> Let's say there is a mapped (declaratively, but that shouldn't matter) >> class, Data, that has fields Data.value1, ... Data.value10. >> >> There is also an instance of this class, data that is populated from the >> data table. >> >> Obviously, you can get the values using data.value1, ... >> >> But is there a simple way to get a data value using the instance object >> (data) and a class field (Data.value1). >> >> What's the easiest way given data and Data.value1 to get / set that value of >> data.value1? > > Data.value1 is a Python descriptor, so Data.value1.__get__(data, Data) would > do it. Or getattr(data, Data.value1.key) as "key" is present on the SQLA > instrumented attribute. >
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