FAQ and Known Issues

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• If you encounter the following exception when calling the Python API of Analytics Zoo when you are using Python 3.5 or 3.6:

Py4JJavaError: An error occurred while calling z:org.apache.spark.bigdl.api.python.BigDLSerDe.loads.
: net.razorvine.pickle.PickleException: expected zero arguments for construction of ClassDict (for numpy.dtype)

you may need to check whether your input argument involves Numpy types (such as numpy.int64). See here for the related issue.

For example, invoking np.min, np.max, np.unique, etc. will return type numpy.int64. One way to solve this is to use int() to convert a number of type numpy.int64 to a Python int.