Numpy array not converting to NDArray in some installations

[Jim Olsen]

OK, so I have a function that uses python to populate a numpy array.  Following this, I use getValue() to obtain the numpy array, expecting to receive a jep.NDArray.  On my macintosh, this works perfectly as expected.  On my windows machine, and on another person's mac, it is coming through as a string object.  The exact same code, with the same versions of numpy.note that the python versions are slightly different across all machines, but the JEP version is exactly the same.

So it seems like in some circumstances it just will not convert a numpy array into an NDArray and does strings instead.  Any thoughts as to why this might occur?

[Ben Steffensmeier]

It sounds like you may have compiled jep without support for numpy. If the build scripts don't detect numpy then jep will be built without numpy support. You may need to rebuild jep with numpy installed or you may need to update something in the build to help it find numpy. To test this theory use either the jep interpreter or jep.eval in your program you should check the value of jep.JEP_NUMPY_ENABLED. Here is an example of how I confirmed numpy is enabled on my currently installed jep:

$ jep
>>> import jep
>>> jep.JEP_NUMPY_ENABLED
1
>>>

Ben

On Tue, Apr 18, 2017 at 1:47 PM, Jim Olsen <clif...@gmail.com> wrote:

OK, so I have a function that uses python to populate a numpy array.  Following this, I use getValue() to obtain the numpy array, expecting to receive a jep.NDArray.  On my macintosh, this works perfectly as expected.  On my windows machine, and on another person's mac, it is coming through as a string object.  The exact same code, with the same versions of numpy.note that the python versions are slightly different across all machines, but the JEP version is exactly the same.

So it seems like in some circumstances it just will not convert a numpy array into an NDArray and does strings instead.  Any thoughts as to why this might occur?

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[Jim Olsen]

OK, think I found what it actually is.  Order of install is important.  I upgraded numpy for another package and that seemed to disable jep support for numpy when using pip install.  simply uninstalling jep and reinstalling made the below test work.  I will confirm this fixes the code, but I was getting zero for a result before I did this....

Thanks!

Jim

On Tuesday, April 18, 2017 at 1:00:55 PM UTC-6, Ben Steffensmeier wrote:

It sounds like you may have compiled jep without support for numpy. If the build scripts don't detect numpy then jep will be built without numpy support. You may need to rebuild jep with numpy installed or you may need to update something in the build to help it find numpy. To test this theory use either the jep interpreter or jep.eval in your program you should check the value of jep.JEP_NUMPY_ENABLED. Here is an example of how I confirmed numpy is enabled on my currently installed jep:

$ jep
>>> import jep
>>> jep.JEP_NUMPY_ENABLED
1
>>>

Ben

On Tue, Apr 18, 2017 at 1:47 PM, Jim Olsen <clif...@gmail.com> wrote:

OK, so I have a function that uses python to populate a numpy array.  Following this, I use getValue() to obtain the numpy array, expecting to receive a jep.NDArray.  On my macintosh, this works perfectly as expected.  On my windows machine, and on another person's mac, it is coming through as a string object.  The exact same code, with the same versions of numpy.note that the python versions are slightly different across all machines, but the JEP version is exactly the same.

So it seems like in some circumstances it just will not convert a numpy array into an NDArray and does strings instead.  Any thoughts as to why this might occur?

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