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pythonpicklejpypejaydebeapi

Can't pickle <java class 'java.lang.Integer'> in python

I'm fetching data from a db with the use of jaydebeapi pkg. I want to serialize the data (it's in list of tuples format) using pickle.

The data may contain different java class types. For a certain data type (<java class 'java.lang.Integer'>) I get the following error message:

PicklingError: Can't pickle <java class 'java.lang.Integer'>: it's not found as java.lang.java.lang.Integer

Is there any way to fix this? Or is there any known workaround?

Thanks a lot!

Solution

  • You should use the JPype Pickle Module instead of pickle.

    from jpype.pickle import JPickler

    From the docs:

    Mixed pickle files containing both Java and Python objects are allowed.