"yaml.safe_load(f) has been removed" Error at gi.vext

[jcmcharro]

Hello,
I had this error:

ERROR:root:error loading spec /home/juanca/Pi-Zero-2W-UART-BLE/venv_ble/share/vext/specs/gi.vext: 
"safe_load()" has been removed, use

yaml = YAML(typ='safe', pure=True)
yaml.load(...)

instead of file "/home/juanca/Pi-Zero-2W-UART-BLE/venv_ble/lib/python3.11/site packages/vext/conf/__init__.py", line 22

data = yaml.safe_load(f)

On the very first program test, the one with just:

  import BLE_GATT
  my_device = BLE_GATT.Central('11:22:33:44:55:66')

I have found this possible solution at https://github.com/vext-python/vext/issues/92.
It seems to be working for me, if you see this could be the right one I hope this issue opening helps you on correcting it for all the rest of possible users.
Thanks!!

[ukBaz]

Thanks for letting me know that this package isn't installing.

This seems to be an issue with vext.gi package having not done a release to PyPI since they've fixed the issue in the code base.

I've tried specifying in setup.py to install directly from github, but I couldn't get this to work.

The dependencies will install on the command line.

After cloning the repository, I used the following steps to install the dependencies and run the tests which seemed to work for me:

python3 -m venv .venv
. .venv/bin/activate 
pip install pip setuptools --upgrade
pip install --upgrade "PyGObject<3.52.0"
pip install git+https://github.com/vext-python/vext.git
pip install git+https://github.com/vext-python/vext.gi.git
pip install dbus-python
pip install python-dbusmock
pip install -e .
python -m unittest tests/test_functional.py

I've run out of time to investigate this further today so these notes are for my future-self (or anyone else that wants to investigate this).

As a workaround, the following install instructions should work (if you have time to test @jcmcharro )

$ python3 -m venv venv_ble
$ . venv_ble/bin/activate
$ pip install pip setuptools --upgrade
$ pip install --upgrade "PyGObject<3.52.0"
$ pip install git+https://github.com/vext-python/vext.git
$ pip3 install BLE_GATT

[jcmcharro]

Thanks a lot for your answer, @ukBaz
I have tried both ways and i get the same result in both of them.
When making:
pip install git+https://github.com/vext-python/vext.gi.git

I get this result:

Looking in indexes: https://pypi.org/simple, https://www.piwheels.org/simple
Collecting git+https://github.com/vext-python/vext.gi.git
  Cloning https://github.com/vext-python/vext.gi.git to /tmp/pip-req-build-3dh4ityg
  Running command git clone --filter=blob:none --quiet https://github.com/vext-python/vext.gi.git /tmp/pip-req-build-3dh4ityg
  Resolved https://github.com/vext-python/vext.gi.git to commit c7a8350c2e5f308bc3ec05fc101a2b85ad6c32a2
  Installing build dependencies ... done
  Getting requirements to build wheel ... error
  error: subprocess-exited-with-error
  
  × Getting requirements to build wheel did not run successfully.
  │ exit code: 1
  ╰─> [42 lines of output]
      Traceback (most recent call last):
        File "/home/juanca/test_BLE_GATT/.venv/lib/python3.11/site-packages/pip/_vendor/pyproject_hooks/_in_process/_in_process.py", line 389, in <module>
          main()
        File "/home/juanca/test_BLE_GATT/.venv/lib/python3.11/site-packages/pip/_vendor/pyproject_hooks/_in_process/_in_process.py", line 373, in main
          json_out["return_val"] = hook(**hook_input["kwargs"])
                                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
        File "/home/juanca/test_BLE_GATT/.venv/lib/python3.11/site-packages/pip/_vendor/pyproject_hooks/_in_process/_in_process.py", line 137, in get_requires_for_build_wheel
          backend = _build_backend()
                    ^^^^^^^^^^^^^^^^
        File "/home/juanca/test_BLE_GATT/.venv/lib/python3.11/site-packages/pip/_vendor/pyproject_hooks/_in_process/_in_process.py", line 70, in _build_backend
          obj = import_module(mod_path)
                ^^^^^^^^^^^^^^^^^^^^^^^
        File "/usr/lib/python3.11/importlib/__init__.py", line 126, in import_module
          return _bootstrap._gcd_import(name[level:], package, level)
                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
        File "<frozen importlib._bootstrap>", line 1206, in _gcd_import
        File "<frozen importlib._bootstrap>", line 1178, in _find_and_load
        File "<frozen importlib._bootstrap>", line 1128, in _find_and_load_unlocked
        File "<frozen importlib._bootstrap>", line 241, in _call_with_frames_removed
        File "<frozen importlib._bootstrap>", line 1206, in _gcd_import
        File "<frozen importlib._bootstrap>", line 1178, in _find_and_load
        File "<frozen importlib._bootstrap>", line 1149, in _find_and_load_unlocked
        File "<frozen importlib._bootstrap>", line 690, in _load_unlocked
        File "<frozen importlib._bootstrap_external>", line 940, in exec_module
        File "<frozen importlib._bootstrap>", line 241, in _call_with_frames_removed
        File "/tmp/pip-build-env-t10rg5z3/overlay/lib/python3.11/site-packages/setuptools/__init__.py", line 26, in <module>
          from .dist import Distribution
        File "/tmp/pip-build-env-t10rg5z3/overlay/lib/python3.11/site-packages/setuptools/dist.py", line 20, in <module>
          from . import (
        File "/tmp/pip-build-env-t10rg5z3/overlay/lib/python3.11/site-packages/setuptools/_entry_points.py", line 6, in <module>
          from jaraco.text import yield_lines
        File "/tmp/pip-build-env-t10rg5z3/overlay/lib/python3.11/site-packages/setuptools/_vendor/jaraco/text/__init__.py", line 12, in <module>
          from jaraco.context import ExceptionTrap
        File "/tmp/pip-build-env-t10rg5z3/overlay/lib/python3.11/site-packages/setuptools/_vendor/jaraco/context.py", line 17, in <module>
          from backports import tarfile
        File "/tmp/pip-build-env-t10rg5z3/overlay/lib/python3.11/site-packages/setuptools/_vendor/backports/__init__.py", line 1, in <module>
          __path__ = __import__('pkgutil').extend_path(__path__, __name__)  # type: ignore
                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
        File "/usr/lib/python3.11/pkgutil.py", line 567, in extend_path
          spec = finder.find_spec(final_name)
                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
      TypeError: GatekeeperFinder.find_spec() missing 1 required positional argument: 'path'
      [end of output]
  
  note: This error originates from a subprocess, and is likely not a problem with pip.
error: subprocess-exited-with-error

× Getting requirements to build wheel did not run successfully.
│ exit code: 1
╰─> See above for output.

note: This error originates from a subprocess, and is likely not a problem with pip.

Let me tell you for moving forward from the step:
pip install --upgrade "PyGObject<3.52.0"
I had to make
sudo apt install cmake libcairo2-dev libcairo2 libgirepository1.0-dev

But I now got stuck at that error where the find_spec() is missing the 'path' argument.

Now that I get you "online", and just in case I should use any of your other libraries, let me explain you my goal... I want to make a Central device to send and get, back and forth, certain parameters values to, and from, some different periferals right now I am mimiking as temperature sensors, thought they are just some devices built by myself for an artistic creation.
I have already tried the UART BLE but that does not allow me to keep some devices "online", my only choice there would be kind of multiplexing the UART among the different units, connecting and disconnecting one at a time for making the reading or update of parameters.
I am expecting the Central device to be connnected with all of them at the same time and comunicate with them, then after, without managing that connection anymore... Is that the way it is going to work with this library? would you suggest me to go with the "python-bluezero" instead?
I will offer myself for continuing on debuging this one meanwhile, despite you tell me the other library would be a better option, if you think it would be worth doing it.
Thanks a lot in advanced, Barry.
Juan Carlos.