Develop Reference

Having trouble with the aiy-python-wheels on Raspberry Pi 3. How do I resolve incompatible glibc issue?

I've gotten my hands on a AIY voice kit v1 and am stuck with the assistant_grpc_demo.py with it failing at an import statement with the grpc. I should have everything installed already, yet google.auth.transport can't seem to find it. I am using a pi 3 A+. Below is the terminal commands I used and their outputs.
pi#raspberrypi:~ $ cat testinput.py
import google.auth.transport.grpc
pi#raspberrypi:~ $ python3 testinput.py
Traceback (most recent call last):
File "/home/pi/.local/lib/python3.7/site-packages/google/auth/transport/grpc.py", line 30, in <module>
import grpc
File "/home/pi/.local/lib/python3.7/site-packages/grpc/__init__.py", line 22, in <module>
from grpc import _compression
File "/home/pi/.local/lib/python3.7/site-packages/grpc/_compression.py", line 15, in <module>
from grpc._cython import cygrpc
ImportError: /lib/arm-linux-gnueabihf/libc.so.6: version `GLIBC_2.33' not found (required by /home/pi/.local/lib/python3.7/site-packages/grpc/_cython/cygrpc.cpython-37m-arm-linux-gnueabihf.so)
The above exception was the direct cause of the following exception:
Traceback (most recent call last):
File "testinput.py", line 1, in <module>
import google.auth.transport.grpc
File "/home/pi/.local/lib/python3.7/site-packages/google/auth/transport/grpc.py", line 37, in <module>
caught_exc,
File "<string>", line 3, in raise_from
ImportError: gRPC is not installed, please install the grpcio package to use the gRPC transport.
*Maybe the glibc part is the problem. Not sure how to resolve that as I already have libc6 2.28. Is there a way to get the aiy-python-wheels to work with my set-up or a previous version. Already tried flashing a pre-built official image built on 4-13-2018 with everything set up, though it failed to boot. Trying to download all packages manually. assistant_library_with_button.sh works though.

Not sure how to resolve that as I already have libc6 2.28
The error message says: .../site-packages/grpc/_cython/cygrpc.cpython-37m-arm-linux-gnueabihf.so requires GLIBC_2.33.
Your libc6 is too old for that gRPC package to work -- it was compiled on a newer system.
You must either:
get a different gRPC package -- one compiled on and suitable for running on a GLIBC-2.28 (or earlier) based system, or
get a different GLIBC package (2.33 or later).

Python Path error - No Module Found error

I'm having issues running ortools on Linux. I downloaded it from google's site (https://developers.google.com/optimization/) and installed it using "make install," but when I go to use it in python I get the following:
Traceback (most recent call last):
File "regular.py", line 42, in <module>
from ortools.constraint_solver import pywrapcp
File "/home/m3/summer/ortools_examples/examples/python/ortools.py", line 2, in <module>
ImportError: No module named linear_solver
It looks like despite installing ortools, its still not in my python path correctly, so when I call it in the file, it doesn't find anything and returns an error, right? Any advice on how to solve this?

Stuck on error loading scipy, using Homebrew install, on macOS Sierra

This happens when I try to do:
import scipy.io
Another scipy module, such as scipy.sparse, seems to be OK.
The root error is:
packages/scipy/special/__init__.py", line 636, in <module>
from ._ufuncs import *
ImportError: dlopen(/usr/local/lib/python2.7/site-packages/scipy/special/_ufuncs.so, 2): Symbol not found: ___addtf3
The full stack trace:
Traceback (most recent call last):
File "HistogramClassifier.py", line 3, in <module>
import scipy.io
File "/usr/local/lib/python2.7/site-packages/scipy/io/__init__.py", line 97, in <module>
from .matlab import loadmat, savemat, whosmat, byteordercodes
File "/usr/local/lib/python2.7/site-packages/scipy/io/matlab/__init__.py", line 13, in <module>
from .mio import loadmat, savemat, whosmat
File "/usr/local/lib/python2.7/site-packages/scipy/io/matlab/mio.py", line 12, in <module>
from .miobase import get_matfile_version, docfiller
File "/usr/local/lib/python2.7/site-packages/scipy/io/matlab/miobase.py", line 22, in <module>
from scipy.misc import doccer
File "/usr/local/lib/python2.7/site-packages/scipy/misc/__init__.py", line 51, in <module>
from scipy.special import comb, factorial, factorial2, factorialk
File "/usr/local/lib/python2.7/site-packages/scipy/special/__init__.py", line 636, in <module>
from ._ufuncs import *
ImportError: dlopen(/usr/local/lib/python2.7/site-packages/scipy/special/_ufuncs.so, 2): Symbol not found: ___addtf3
Referenced from: /usr/local/lib/python2.7/site-packages/scipy/special/../.dylibs/libquadmath.0.dylib
Expected in: /usr/lib/libSystem.B.dylib
in /usr/local/lib/python2.7/site-packages/scipy/special/../.dylibs/libquadmath.0.dylib
That's pretty much it. Google returns quite a few hits, but they're either very old, or not the same lib, or things that I've tried. The rest of this post is all the stuff I found/tried so far that didn't work.
Double checking python:
which python
/usr/local/bin/python
ls -l /usr/local/bin/python
lrwxr-xr-x ... /usr/local/bin/python -> ../Cellar/python/2.7.13/bin/python
I'm not currently using virtual env.
I think Homebrew is OK:
brew doctor
Your system is ready to brew.
This is after trying this:
brew update
brew upgrade
I've also tried uninstalling and reinstalling the scipy package, both with brew and with pip.
I've tried various other things, but don't want to mess up a working Homebrew setup.
Older posts that Google brought back talk about "cobra", as far as I know I'm not using that. "which cobra" doesn't return anything.
Other things from Google talk about the order of the library path, but that seemed to be if you were using the built-in python, which I don't don't think is applicable since I believe I'm using Homebrew's version.
Clearly it has something to do with a library, maybe fortran related, but what to type in to fix it... don't know where to start.

Try this: remove /usr/lib/libSystem.B.dylib temporarily and then reinstall scipy.

Corrupted version of Matlab Engine for python on MacOSX 10.11

I used the Matlab Engine for Python a lot last fall, without any trouble. I just tried to reuse my old code today and I get the following error:
>>> import matlab.engine
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "/Library/Python/2.7/site-packages/matlab/engine/__init__.py", line 59, in <module>
raise EnvironmentError('The installation of MATLAB Engine for Python is '
EnvironmentError: The installation of MATLAB Engine for Python is corrupted. Please reinstall it or contact MathWorks Technical Support for assistance.
I am on MacOSX 10.11 (El Capitan), using Python 2.7 and Matlab 2015a. I reinstalled the Matlab Engine twice already, but no difference, I still get the same error.
Looking at the ini.py file, it seems that the line that fails is the following, yielding the error copied here:
>>> pythonengine = importlib.import_module("matlabengineforpython"+_PYTHONVERSION)
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/importlib/__init__.py", line 37, in import_module
__import__(name)
ImportError: dlopen(/Applications/MATLAB_R2015a.app/extern/engines/python/dist/matlab/engine/maci64/matlabengineforpython2_7.so, 2): Library not loaded: #rpath/libpython2.7.dylib
Referenced from: /Applications/MATLAB_R2015a.app/extern/engines/python/dist/matlab/engine/maci64/matlabengineforpython2_7.so
Reason: image not found
I have read a similar question where the answers pointed towards an issue with the libpython2.7.dylib HERE but I'm not sure I understand the solution. I can see the libpython2.7.dylib file in my /usr/lib/ folder.

Based on THIS LINK, it seems like a possible issue is that MacOSX 10.11 requires Matlab 2015b or higher. However, Matlab 2015a works fine on my computer right now, so I'm not sure why the Engine wouldn't.

PYTHON DLL load failed

I usually code in Matlab but I found a nice piece of PYTHON code that I would like to use. However having downloaded the package it is proving difficult to run. I'm getting the following error:
Traceback (most recent call last):
File "C:\launch.py", line 29, in <module>
from src.smcsquare import SMCsquare
File "C:\src\smcsquare.py", line 32, in <module>
from scipy.stats import norm
File "C:\Python34\lib\site-packages\scipy\stats\__init__.py", line 338, in <module>
from .stats import *
File "C:\Python34\lib\site-packages\scipy\stats\stats.py", line 184, in <module>
import scipy.special as special
File "C:\Python34\lib\site-packages\scipy\special\__init__.py", line 586, in <module>
from ._ufuncs import *
ImportError: DLL load failed: The specified module could not be found.
The _ufuncs.pyd is there in the C:\Python34\lib\site-packages\scipy\special\ directory. I tried adding this to my PYTHONPATH but it made no difference. I have also tried so dll fixers but these have not helped.
Has anyone encountered this and did you find a solution?

As other have said, make sure your .whl file matches the version and 32/64bit of the python distribution you're using.
Next, the problem I was having was I forgot to download and install the extra "numpy+mkl" package per the instruction: http://www.lfd.uci.edu/~gohlke/pythonlibs/#scipy
So for me it was numpy-1.11.0+mkl-cp35-cp35m-win_amd64.whl, which I downloaded and then:
python -m pip install numpy-1.11.0+mkl-cp35-cp35m-win_amd64.whl
I had already installed the regular numpy package via pip, but I just installed this one over it and everything started working and has been fine so far.