2010/8/5, Konstantin Klementiev <kklement...@cells.es>: > Dear all, > > I am impressed by the performance and features of pyTables described in its > manual. I hope it can suite my needs as well.
Well, fitting your needs is the main point indeed. > I want to store a big dataset of values calculated in arbitrary precision > arithmetic. Each value consists of three long integers: numerator, > denominator > and an integer under sqrt() calculated in sympy. > > Question 1: > Can long integers (each one of virtually unlimited length) be stored by > pyTables? Yes. Use a VLArray leaf with an ObjectAtom. The long integers will be automatically pickled when saved and unpickled when loaded. > > Because many of my values are zeroes, the dataset will be indexed by a > clever > indexing function that ignores these zeroes, where each index points to a > variable-length record. > > Question 2: > Can pyTables store records of different length? Each item of these records > is > again represented by three long integers. Again, the leaf that support records of different length is VLArray. Take it a look and see if it fits your bill. Cheers, -- Francesc Alted ------------------------------------------------------------------------------ This SF.net email is sponsored by Make an app they can't live without Enter the BlackBerry Developer Challenge http://p.sf.net/sfu/RIM-dev2dev _______________________________________________ Pytables-users mailing list Pytables-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/pytables-users
