11th Week of 2022

Coding⚑

Python⚑

Pytest⚑

• New: Run tests in a random order.

  pytest-random-order is a pytest plugin that randomises the order of tests. This can be useful to detect a test that passes just because it happens to run after an unrelated test that leaves the system in a favourable state.

  To use it add the --random-order to your pytest run.

  It can't yet be used with pytest-xdist though :(.

Pydantic⚑

• New: Use mypy pydantic's plugin.

  If you use mypy I highly recommend you to activate the pydantic plugin by adding to your pyproject.toml:

  [tool.mypy]
  plugins = [
    "pydantic.mypy"
  ]
  
  [tool.pydantic-mypy]
  init_forbid_extra = true
  init_typed = true
  warn_required_dynamic_aliases = true
  warn_untyped_fields = true
  

HTML⚑

• New: Sum up the W3 HTML tutorial.

CSS⚑

• New: Sum up the W3 CSS tutorial.

DevOps⚑

Monitoring⚑

AlertManager⚑

• New: Use regular expressions in silences.

  To silence an alert with a regular expression use the matcher alertname=~".*Condition".

Operative Systems⚑

Linux⚑

Linux Snippets⚑

• New: Clean old kernels.

  The full command is

  dpkg -l linux-* | awk '/^ii/{ print $2}' | grep -v -e `uname -r | cut -f1,2 -d"-"` | grep -e [0-9] | grep -E "(image|headers)" | xargs sudo apt-get -y purge
  

  To test what packages will it remove use:

  dpkg -l linux-* | awk '/^ii/{ print $2}' | grep -v -e `uname -r | cut -f1,2 -d"-"` | grep -e [0-9] | grep -E "(image|headers)" | xargs sudo apt-get --dry-run remove
  

  Remember that your running kernel can be obtained by uname -r.