Sense Hat can't find RTIMU after upgrade to Python 3.5.2

I recently upgraded the GNU R packages from 3.1.1 to 3.3.1. To do this, I had to add the stretch distribution to my /etc/apt/sources.list file. In the process of successfully upgrading GNU R, apt also chose to install an upgraded version of Python3. Now when I try to use the Sense Hat module with Python3, I get the following error message:

`Python 3.5.2+ (default, Sep 22 2016, 12:18:14) [GCC 6.1.1 20160802] on linux Type “copyright”, “credits” or “license()” for more information.

from sense_hat import SenseHat Traceback (most recent call last): File “<pyshell#0>”, line 1, in <module> from sense_hat import SenseHat File “/usr/lib/python3/dist-packages/sense_hat/init.py”, line 2, in <module> from .sense_hat import SenseHat, SenseHat as AstroPi File “/usr/lib/python3/dist-packages/sense_hat/sense_hat.py”, line 10, in <module> import RTIMU # custom version ImportError: No module named ‘RTIMU’ `

pip3 reports that sense-hat 2.2.0 and RTIMUlib 7.2.1 are installed. I do NOT get this error when I use Python 2.7.9.

Any ideas on what got broken during the apt-get install of r-base? It was working fine before the GNU R upgrade.

[eplanet]

That’s very nice of you! I just tested successfully with:

sudo apt install libopenjp2-7 sense-hat
pip install sense-hat rtimulib

That seem to be sufficient, libtiff-tools is installed as a sense-hat dependency and I didn’t need libatlas-base-dev at all. Hope this helps!

[eplanet]

As it’s not very clear in that thread, I’d like to share what I did. Basically following bennuttall recommendation did the trick:

• Create a virtualenv:
  • virtualenv -p /usr/bin/python3 ~/.ve/sensorhat
  • source ~/.ve/sensorhat/bin/activate
• Clone RTIMULib:
  • git clone https://github.com/RPi-Distro/RTIMULib/ RTIMU
  • cd RTIMU/Linux/python
• Follow instruction in RTIMULib/Linux/python:
  • sudo apt install python3-dev
  • python setup.py build
  • python setup.py install
• Install libopenjp2-7:
  • sudo apt install libopenjp2-7
• Install sense-hat:
  • sudo apt install sense-hat

That should do the trick. Some code like this should work:

from sense_hat import SenseHat

sense = SenseHat()
print('temperature', float(sense.get_temperature()))
print('humidity', float(sense.get_humidity()))
print('pressure', float(sense.get_pressure()))