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24th November 2022




  • New: The tmp_path fixture.

    You can use the tmp_path fixture which will provide a temporary directory unique to the test invocation, created in the base temporary directory.

    tmp_path is a pathlib.Path object. Here is an example test usage:

    def test_create_file(tmp_path):
        d = tmp_path / "sub"
        p = d / "hello.txt"
        assert p.read_text() == CONTENT
        assert len(list(tmp_path.iterdir())) == 1
        assert 0
  • Correction: Deprecate the tmpdir fixture.

    Warning: Don't use tmpdir use tmp_path instead because tmpdir uses py which is unmaintained and has unpatched vulnerabilities.


  • Correction: Deprecate tmpdir in favour of tmp_path.
  • New: Pad integer with zeros.

    >>> length = 1
    >>> print(f'length = {length:03}')
    length = 001


Continuous Integration

Operating Systems


Linux Snippets

  • New: Df and du showing different results.

    Sometimes on a linux machine you will notice that both df command (display free disk space) and du command (display disk usage statistics) report different output. Usually, df will output a bigger disk usage than du.

    The du command estimates file space usage, and the df command shows file system disk space usage.

    There are many reasons why this could be happening:

  • New: Clean up docker data.

    To remove unused docker data you can run docker system prune -a. This will remove:

    • All stopped containers
    • All networks not used by at least one container
    • All images without at least one container associated to them
    • All build cache

    Sometimes that's not enough, and your /var/lib/docker directory still weights more than it should. In those cases:

    • Stop the docker service.
    • Remove or move the data to another directory
    • Start the docker service.

    In order not to loose your persisted data, you need to configure your dockers to mount the data from a directory that's not within /var/lib/docker.


  • New: Problems accessing redis locally.

    If you're with the VPN connected, turn it off.

  • New: PDB behaves weird.

    Sometimes you have two traces at the same time, so each time you run a PDB command it jumps from pdb trace. Quite confusing. Try to c the one you don't want so that you're left with the one you want. Or put the pdb trace in a conditional that only matches one of both threads.


  • New: Get documents that match a string.

    bash curl \ -H 'Content-Type: application/json' \ -XPOST "https://localhost:9200/_search" \ -d' { "query": { "query_string": {"query": "test company"} }}'