Question

I have some Java’s serialized objects (arrays of doubles) in MySql database fields that I generated previously. Now I needed to read them from Python and I have just realized that it is probably not possible to do directly.

Then I tried to convert them to strings in java (simply comma delimited), and manually parse them from Python. But, it turned out that parsing from Python works painfully slow this way. Is there any better way for serializing arrays that is compatible between Java and Python?

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Edit: Sorry, my parsing code was the problem, of course. I replaced it with this:

stringList = string.split(', ')
svdVector = [float(x) for x in stringList]

..and now it is almost instant for my case of 1000×1000 doubles. Although it still feels wrong to store doubles as strings instead of binary, but since it’s easy to code and runs fast enough, it is fine.

Answer 1

Python comes with modules for CSV files, XML, and JSON, so one of those would likely do the trick quite well.