plapperkasten 0.2.3

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plapperkasten

Coding

Style

Docstrings are formatted according to the Google Style Guide.

All other formatting tries to adhere to PEP8 and is enforced by YAPF.

Log entries use lazy evaluation, i.e., logger.debug('start %s', name), start with a lower-case letter and do not end with a full stop.

Raised errors on the other hand use f-strings (if necessary) and contain whole sentences, i.e. ValueError(f'{variable} did not match XXXX.').

Linting / Checking

Code should be checked by pylint and mypy.

Paths

All path representations should be pathlib.Path-objects instead of strings.

Logging

Logging uses a wrapper (plapperkasten.plklogging) around the logging module to cover logging from multiple processes.

Import a logger using:

from plapperkasten.plklogging import plklogging

logger: plklogging.PlkLogger = plklogging.get_logger(__name__)

# your code here

Setup as an isolated app integrated into the system (e.g. on a remote box)

Please see https://github.com/randomchars42/plapperkasten-setup for detailed instructions and an easy installer.

Setup for development

Requirements

• Python >= 3.9 as it uses typehinting only available beginning with 3.9.

Semi-optional:

• libgpiod with python3-libgpiod and gpiodmonitor>=1.0.0 if you plan to use the inputgpiod-plugin. Alternatively you may implement the functionality using RPi.GPIO or any library of your choice.

Recommendations

• pipenv to create a virtual environment with a defined python version

  pip3 install pipenv
  

Example setup using pipenv

git clone [e-mail]:randomchars42/plapperkasten.git

cd plapperkasten

# consider adding this to your .bashrc / equivalent for your shell:
# `export PIPENV_VENV_IN_PROJECT=1`
# this leads to a folder `.venv` being created at the project root
# otherwise you might need to tweak the `[tool.mypy]`` path in
# `pyproject.toml` (depending on your editor setup).

# setup a virtual environment with set python version
# set the version to >= 3.9
pipenv --python 3.9

# install development dependencies
pipenv install --dev

# activate venv
pipenv shell