General linux help with virtualenv

1

I’m trying to install flyte’s pi-mqtt-gpio python app on a second raspi to expose a whole bunch of GPIOs for use with HA via mqtt.

Under the Serving Suggestion topic everything was going well until I got to:

cd /home/pi
virtualenv ve

At which point I get the error:

bash: virtualenv: command not found

Any idea how I can fix this?

2

sudo pip install --upgrade virtualenv instead of pip install --upgrade virtualenvseems to have fixed it.

3

Still need help.

I have it up and running:

pi@hassio_mqtt_slave:~ $ sudo supervisorctl status
pi_mqtt_gpio                     RUNNING   pid 2717, uptime 0:00:07

Unfortunately it’s not working.

Looking at the log file I see:

Last will set on 'hassio_slave/status' as 'dead'.
Requirement already satisfied: RPi.GPIO in /usr/lib/python2.7/dist-packages
Traceback (most recent call last):
  File "/usr/lib/python2.7/runpy.py", line 174, in _run_module_as_main
    "__main__", fname, loader, pkg_name)
  File "/usr/lib/python2.7/runpy.py", line 72, in _run_code
    exec code in run_globals
  File "/home/pi/mqtt_slave/lib/python2.7/site-packages/pi_mqtt_gpio/server.py", line 450, in <module>
    gpio_config)
  File "/home/pi/mqtt_slave/lib/python2.7/site-packages/pi_mqtt_gpio/server.py", line 391, in configure_gpio_module
    return gpio_module.GPIO(gpio_config)
  File "/home/pi/mqtt_slave/local/lib/python2.7/site-packages/pi_mqtt_gpio/modules/raspberrypi.py", line 16, in __init__
    import RPi.GPIO as gpio
ImportError: No module named RPi.GPIO

Tried to install RPi.GPIO in the venv but got this:

pi@hassio_mqtt_slave:~ $ sudo supervisorctl stop pi_mqtt_gpio
pi_mqtt_gpio: stopped
pi@hassio_mqtt_slave:~ $ . mqtt_slave/bin/activate
(mqtt_slave) pi@hassio_mqtt_slave:~ $ sudo pip install RPi.GPIO
Requirement already satisfied: RPi.GPIO in /usr/lib/python2.7/dist-packages

I’m a total newb at this. Any help would be appreciated.

4

Using sudo runs the command as root user. Switching user takes you out of the virtual environment. If you need to install a python package in the virtual environment you must do so as the user that invokes the virtual environment

. mqtt_slave/bin/activate
pip install RPi.GPIO
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5

Magic! Thank you.

All working as expected.

1 Like