I have created a virtual enviroment on my RPI3 (Raspbian-Jessie), so that I may more easily work with a particular image-searching software (as outlined in this tutorial, step #4).
My script requires a module, "smbus", to use I2C while running a python 2.7 script in my virtual environment.
The issue is that I can't import the module when the environment is activated, and I can't install in within the environment.
(cv) pi@raspberrypi:~ $ python i2ctest1.py
Traceback (most recent call last):
File "i2ctest1.py", line 1, in <module>
ImportError: No module named smbus
It will however import just fine outside that "cv" environment. I can see the module installed:
pi@raspberrypi:~ $ pip freeze [...] smbus==1.1 [...]
But inside the environment, smbus is not there:
(cv) pi@raspberrypi:~ $ pip freeze imutils==0.3.6 numpy==1.11.1 picamera==1.12 Shapely==1.5.17 spidev==3.2
I tried installing smbus with the environment activated, but it just tells me it is already installed:
(cv) pi@raspberrypi:~ $ sudo apt-get install python-smbus Reading package lists... Done Building dependency tree Reading state information... Done python-smbus is already the newest version. 0 upgraded, 0 newly installed, 0 to remove and 96 not upgraded.
I also tried :
(cv) pi@raspberrypi:~ $ sudo pip install smbus
Requirement already satisfied (use --upgrade to upgrade): smbus in /usr/lib/python2.7/dist-packages (cv) pi@raspberrypi:~ $ sudo pip install smbus --upgrade Requirement already up-to-date: smbus in /usr/lib/python2.7/dist-packages
I read this link on virtual environments, but I was not able to understand what I've done wrong.
Do I need to install the module differently, or do I just need to import it differently?