Since Python 3.7, calling Py_Initialize() twice now fails with a fatal error:

Fatal Python error: _Py_InitializeCore: main interpreter already initialized

But PyInit__jpype() calls Py_Initialize() at native/python/jpype_python.cpp:161:

https://github.com/originell/jpype/blob/490eb6511a0a0b57be2191cbbf3a90bac45e5879/native/python/jpype_python.cpp#L150-L157

It doesn't make sense to call Py_Initialize() in the initialization function of a module, since Python must be initialized to able to... import jpype :-)

The fix is just to remove the call.