I’ll give some tips to reuse field and model validators and serializers. All my examples will use validators, but it works exactly the same for serializers.

def _is_above_ten(value: int):
    if value > 10:
        return value

    raise ValueError(f"{value …

You can export a notebook directly from the interface under File > Save and Export Notebook As. You can also do it in CLI with:

jupyter nbconvert --execute --to <FORMAT> my_notebook.ipynb

The --execute will execute the notebook to make sure all output cells are up to date. Many export formats …

As part of my work to uniformize my server setup around systemd, I decided to make nginx log everything with journald. By default, it logs accesses and errors in log files under /var/log/nginx. I already had one log file per vhost.

To do the change, I changed my …

I recently learned while reading psycopg’s documentation (a Python driver for PostgreSQL), that you should use WHERE id = ANY(:values) instead of WHERE id IN :values when filtering over lists. That’s because the ANY operator works with empty list while IN doesn’t. Psycopg will also correctly adapt …

Let’s encrypt recently announced they will stop sending emails when certificates must be renewed. Following this announcement, I created a small script to monitor the status of my certificates and receive an email if they are not renewed in time. Since it can be handy, here it is!

The …

You can run scripts (written in Python or any other language) directly on a server if the proper interpreter is installed. I recently used it to run a Python script over several servers without the need to copy the relevant script on the server. It all relies on the following …

Commits that change formatting are a pain in git because they make using git blame much harder. It turns out, you can ask git to ignore these commits when running git blame with the --ignore-rev option and passing it a commit hash. You can even do things better and create …

Here is an unsorted type tips I find useful in TypeScript. I may update it when I find new ones. Don't hesitate to share yours in the comments!

Another good start, is to read this page from the handbook which list various builtin utility types. If you are really motivated …

I recently learned that context managers created with @contextmanager can be used either as a context manager or a decorator:

from contextlib import contextmanager

@contextmanager
def test_context():
    print('Entering')
    yield
    print('Leaving')

with test_context():
    print('Inside')

@test_context()
def test_decorated():
    print('Decorated')

test_decorated()

We will yield:

Entering
Inside
Leaving

Entering
Decorated …

If you need to load a specific font in a component, you can use this hook. It will return true when the fonts are loaded. It relies on the document.fonts API to load the fonts. If the fonts are already loaded, the promise will be fulfilled immediately and the …