Not working in venv

[ukBaz]

Doesn't seem to work without this. Is there another way to get it working?

On Raspberry Pi running python script.py from venv doesn't work. I'm running as pi user and I've added pi user to bluetooth group.

Originally posted by @MaikuMori in https://github.com/ukBaz/python-bluezero/issues/315#issuecomment-770622944

[MaikuMori]

Thanks, for opening this. I didn't want to open an issue in case it was something simple.

[ukBaz]

I think this might be a different issue. There is a dependency in Bluezero on using Python D-Bus which on the RPi is in the main system python install. I have typically solved this by using the option --system-site-packages. Although the down side of that is that you lose much of the benefit of having a venv.

You might want to have a look at pip installing https://pypi.org/project/dbus-python/ in your venv as that might get you around the issue. You might also need https://pypi.org/project/vext.gi/

[MaikuMori]

I believe I have it already installed.

These are my dependencies:

[tool.poetry.dependencies]
python = "^3.9"
bluezero = "^0.5.0"
dbus-python = "^1.2.16"
PyGObject = "^3.38.0"

[tool.poetry.dev-dependencies]
pytest = "^5.2"
flake8 = "^3.8.4"
black = {version = "^20.8b1", allow-prereleases = true}

With a modified version of the old dbus config most stuff works. I have a peripheral which I can connect and interact with my phone. I'm currently having some trouble with central, but I don't think it's related. If I remove the dbus config nothing works.

[ukBaz]

Here is the transcript of me creating a venv and installing Bluezero into it. I have used the cpu_temperature.py from the example in Bluezero. I have run without things being installed in the venv to show the error messages. As you will see at the end, the example does run and I can successfully get the notifications on my phone.

pi@SensePi:/tmp/test_bluezero $ ll /etc/dbus-1/system.d/uk*
ls: cannot access '/etc/dbus-1/system.d/uk*': No such file or directory
pi@SensePi:/tmp/test_bluezero $ python3 -m venv venv
pi@SensePi:/tmp/test_bluezero $ . venv/bin/activate
(venv) pi@SensePi:/tmp/test_bluezero $ pip install bluezero
Looking in indexes: https://pypi.org/simple, https://www.piwheels.org/simple
Collecting bluezero
  Using cached https://files.pythonhosted.org/packages/4d/8e/3ccfa30096214c23c7b84843ba4f6b8f7ea476f9b57b57047c98a6ff6d57/bluezero-0.5.0-py2.py3-none-any.whl
Installing collected packages: bluezero
Successfully installed bluezero-0.5.0
(venv) pi@SensePi:/tmp/test_bluezero $ python cpu_temperature.py 
Traceback (most recent call last):
  File "cpu_temperature.py", line 7, in <module>
    from bluezero import async_tools
  File "/tmp/test_bluezero/venv/lib/python3.7/site-packages/bluezero/async_tools.py", line 5, in <module>
    import dbus
ModuleNotFoundError: No module named 'dbus'
(venv) pi@SensePi:/tmp/test_bluezero $ pip install dbus-python
Looking in indexes: https://pypi.org/simple, https://www.piwheels.org/simple
Collecting dbus-python
  Using cached https://www.piwheels.org/simple/dbus-python/dbus_python-1.2.16-cp37-cp37m-linux_armv7l.whl
Installing collected packages: dbus-python
Successfully installed dbus-python-1.2.16
(venv) pi@SensePi:/tmp/test_bluezero $ python cpu_temperature.py 
Traceback (most recent call last):
  File "cpu_temperature.py", line 7, in <module>
    from bluezero import async_tools
  File "/tmp/test_bluezero/venv/lib/python3.7/site-packages/bluezero/async_tools.py", line 7, in <module>
    from gi.repository import GLib
ModuleNotFoundError: No module named 'gi'
(venv) pi@SensePi:/tmp/test_bluezero $ pip install vext.gi
Looking in indexes: https://pypi.org/simple, https://www.piwheels.org/simple
Collecting vext.gi
  Using cached https://files.pythonhosted.org/packages/6f/51/c83d41bda3b2766c4dc792f328078fdc1e1fa5742b6880301bf56db63878/vext.gi-0.7.4.tar.gz
Collecting vext>=0.7.4 (from vext.gi)
  Using cached https://www.piwheels.org/simple/vext/vext-0.7.4-py3-none-any.whl
Collecting ruamel.yaml>=0.11.10 (from vext>=0.7.4->vext.gi)
  Using cached https://files.pythonhosted.org/packages/7e/39/186f14f3836ac5d2a6a042c8de69988770e8b9abb537610edc429e4914aa/ruamel.yaml-0.16.12-py2.py3-none-any.whl
Collecting ruamel.yaml.clib>=0.1.2; platform_python_implementation == "CPython" and python_version < "3.9" (from ruamel.yaml>=0.11.10->vext>=0.7.4->vext.gi)
  Using cached https://www.piwheels.org/simple/ruamel-yaml-clib/ruamel.yaml.clib-0.2.2-cp37-cp37m-linux_armv7l.whl
Building wheels for collected packages: vext.gi
  Running setup.py bdist_wheel for vext.gi ... error
  Complete output from command /tmp/test_bluezero/venv/bin/python3 -u -c "import setuptools, tokenize;__file__='/tmp/pip-install-qwj8st23/vext.gi/setup.py';f=getattr(tokenize, 'open', open)(__file__);code=f.read().replace('\r\n', '\n');f.close();exec(compile(code, __file__, 'exec'))" bdist_wheel -d /tmp/pip-wheel-q34k1581 --python-tag cp37:
  usage: -c [global_opts] cmd1 [cmd1_opts] [cmd2 [cmd2_opts] ...]
     or: -c --help [cmd1 cmd2 ...]
     or: -c --help-commands
     or: -c cmd --help

  error: invalid command 'bdist_wheel'

  ----------------------------------------
  Failed building wheel for vext.gi
  Running setup.py clean for vext.gi
Failed to build vext.gi
Installing collected packages: ruamel.yaml.clib, ruamel.yaml, vext, vext.gi
  Running setup.py install for vext.gi ... done
Successfully installed ruamel.yaml-0.16.12 ruamel.yaml.clib-0.2.2 vext-0.7.4 vext.gi-0.7.4
(venv) pi@SensePi:/tmp/test_bluezero $ pip install vext.gi
Looking in indexes: https://pypi.org/simple, https://www.piwheels.org/simple
Requirement already satisfied: vext.gi in ./venv/lib/python3.7/site-packages (0.7.4)
Requirement already satisfied: vext>=0.7.4 in ./venv/lib/python3.7/site-packages (from vext.gi) (0.7.4)
Requirement already satisfied: ruamel.yaml>=0.11.10 in ./venv/lib/python3.7/site-packages (from vext>=0.7.4->vext.gi) (0.16.12)
Requirement already satisfied: ruamel.yaml.clib>=0.1.2; platform_python_implementation == "CPython" and python_version < "3.9" in ./venv/lib/python3.7/site-packages (from ruamel.yaml>=0.11.10->vext>=0.7.4->vext.gi) (0.2.2)
(venv) pi@SensePi:/tmp/test_bluezero $ python cpu_temperature.py 
CPU temperature is 38.9°C
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Are you able to run the same experiment on you system to see if it works?

[WayneKeenan]

There’s also this: https://github.com/ukBaz/python-bluezero/issues/307

[MaikuMori]

I'll try to reproduce using your steps. Probably tomorrow. It's getting very late here.

[ukBaz]

This looks to be resolved so closing