How to access other library from main.py ?

[dwh6411]

Hi Thanks for the job, it works quite well on my Pi2. I need adapt it to my use now. I have problem to access general library from Main.py or actions.py for example : I install LCD module Luma.LCD with "sudo -H pip install --upgrade luma.lcd" and I can run my LCD outside , However I import luma.lcd inside main.py, it cannot find the module. It is the same that cannot find urllib2 , which can be run outside of main.py. I find that : gassistant use its own python from " /home/pi/env/bin/python -u /home/pi/GassistPi/src/main.py .."
which python get result ==> /usr/bin/python
My question is that : How can I make general library accessible from main.py with /home/pi/env/bin/python ? Do I need reinstall the module with pip3 from /home/pi/env/bin/ ? or just pip ( which pip)?
Thanks ! weihua

[shivasiddharth]

You need to install the packages within environment. First move into the environment using: source env/bin/activate Then use pip commands to install. Just pip. We are currently working in Python3 environment and hence i dont think urllib2 installation is possible. But as a part of the installation we are already installing urllib3. So its just a matter of finding the components. A quick google search can help you spot urllib2 equivalents in ulrlib3 (subscript 2 and 3 and not interchangeable as the components of the packages are not bundled similarly).

[dwh6411]

Hi shivasiddharth, Thank you for your guide, I will check with that.

[dwh6411]

Hi shivasiddharth, I source the environment as you mentioned and reinstall with pip ==> pi@Pi2:~ $ source env/bin/activate (env) pi@Pi2:~ $ sudo -H pip install --upgrade luma.lcd

Requirement already up-to-date: luma.lcd in /usr/local/lib/python2.7/dist-packages Requirement already up-to-date: luma.core>=1.1.1 in /usr/local/lib/python2.7/dist-packages (from luma.lcd) Requirement already up-to-date: pillow>=4.0.0 in /usr/local/lib/python2.7/dist-packages (from luma.core>=1.1.1->luma.lcd) Requirement already up-to-date: monotonic; python_version < "3.3" in /usr/local/lib/python2.7/dist-packages (from luma.core>=1.1.1->luma.lcd) Requirement already up-to-date: smbus2 in /usr/local/lib/python2.7/dist-packages (from luma.core>=1.1.1->luma.lcd) Requirement already up-to-date: RPI.GPIO; platform_system == "Linux" in /usr/lib/python2.7/dist-packages (from luma.core>=1.1.1->luma.lcd) Requirement already up-to-date: spidev; platform_system == "Linux" in /usr/lib/python2.7/dist-packages (from luma.core>=1.1.1->luma.lcd)

===== if I import Luma module in main.py: from luma.core.interface.serial import spi I still get the error : ImportError: No module named 'luma'

As you can see, the pip only used with python 2.7 However Gassistant using Python 3.5 ?
Any ideas ? By the way, I find my urllib3 equivalent api. Thanks.

[shivasiddharth]

When you use a sudo command, the installation happens in the root directory. Command should be just pip install

[dwh6411]

Hi shivasiddharth, Thanks, Now the error disappear ! 👍

[shivasiddharth]

Ok, closing this issue then !