I’ve been following the instructions for the Bibliopixel Tutorial and haven’t made it past Testing (i.e bp demo matrix). I’m getting an error with Numpy and I think it’s the same one (fix numpy on pi) that you noted below. I’m attaching a file with more details but here’s a shortened version.
From the lengthy Traceback error message:
File “/home/pi/.local/lib/python3.5/site-packages/numpy/core/overrides.py”, line 6, in
from numpy.core._multiarray_umath import (
ImportError: libf77blas.so.3: cannot open shared object file: No such file or directory
My search of the installed files has this - not sure I understand how this is supposed to work:
/home/pi/.local/lib/python3.5/site-packages/numpy/core/_multiarray_umath.cpython-35m-arm-linux-gnueabihf.so
I see that there’s a new version of numpy on scipy.org but I’m not sure yet that I want to try that or the previous version until I get some more clarification about how to fix the bp demo error.
Thanks for your help!
BP Error (5.43 KB)
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On Tuesday, November 20, 2018 at 5:18:35 PM UTC-5, Adam Haile wrote:
Robert, Can you copy the full output from the pip install bibliopixel command? I feel like we are missing some stuff from your error.
However, I think you might just need this: sudo apt-get install libatlas-base-dev
Then install again. At least I remember I had a problem with numpy on the Pi a while back and I have a note for myself with no context other than “fix numpy on pi” and that command 
But I’m pretty sure it had to do with some multiarray thing.
At least it’s a place to start
On Tue, Nov 20, 2018 at 5:14 PM Tom Swirly t...@swirly.com wrote:
Sorry about that.
So you get an error installing numpy even into a fresh virtualenv?!
This probably isn’t our error directly - numpy is an extremely common package.
That’s really baffling! I did some research on this, and people suggest it might be that your version of Python that’s broken?
You could try installing Python 3.6 or even 3.7 and try again with that version?
On Tue, Nov 20, 2018 at 11:10 PM Tom Swirly t...@swirly.com wrote:
Ah, so you get this error
On Tue, Nov 20, 2018 at 11:03 PM Robert Joyce trir...@gmail.com wrote:
Hello, I am trying to install bibliopixel running on a raspberry pi 3 model b running raspbian stretch 11-13-2018 build. I have tried installing using both “sudo” and using ”virtulenv”.each way bibliopixel starts to build and fails do to a problem with numpy. Python version in this version of raspbian is 3.5.3 and I have been using pip3 install.
The error is: Importing the mulitarray numpy extension module failed. Most likely you are trying to import a failed build of numpy. If you’re working with a numpy git repo, try “git clean -xdf (remove all files not under version control). Otherwise reinstall numpy.
I tried uninstalling numpy and then reinstalling numpy and get the same error.
Any help would be appreciated even if it is the recommendation to downgrade to an earlier version of the raspbian build that is verified to work with bibliopixel.
Thank you
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