Julien Danjou

Earlier this year, I was supposed to participate to dotPy, a one-day Python conference happening in Paris. This event has unfortunately been cancelled due to the COVID-19 pandemic. Both Victor

If you never heard of the 10x engineer myth, it's a pretty great concept. It boils down to the idea where an engineer could be 10x more efficient than a

It has been close to a year now that I've incorporated my new company, Mergify. I've been busy, and I barely wrote anything about it so far. Now is an

This weekend, I've been lucky to attend again the FOSDEM conference, one of the largest open-source conference out there. I had a talk scheduled in the Python devroom on Saturday

At Mergify, we generate a pretty large amount of logs. Every time an event is received from GitHub for a particular pull request, our engine computes a new state for

At Datadog, we're really into metrics. We love them, we store them, but we also generate them. To do that, you need to juggle with integers that are incremented, also

There's not a single month where I don't have to explain this. I thought it'd be a good opportunity to write about this .gitignore file so everyone is up to

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What do you need to send an email with Python? Some basic programming and web knowledge along with the elementary Python skills. I assume you’ve already had a web

Nowadays, it is more than likely that you will have to write an HTTP client for your application that will have to talk to another HTTP server. The ubiquity of

Dependencies are a nightmare for many people. Some even argue they are technical debt. Managing the list of the libraries of your software is a horrible experience. Updating them — automatically?

If you remember well, a couple of years ago, I wrote about Mastering PostgreSQL, a fantastic book written by my friend Dimitri Fontaine. Dimitri is a long-time PostgreSQL core developer

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A few weeks ago, I introduced you to functional programming in Python. Today, I'd like to go further into this topic and show you so more interesting features. Lambda FunctionsWhat

Many Python developers are unaware of the extent to which you can use functional programming in Python, which is a shame: with few exceptions, functional programming allows you to write

A few months ago, we've seen how to write a filtering syntax tree in Python. The idea behind this was to create a data structure — in the form of a

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Logging is one of the most underrated features. Often ignored by software engineers, it can save your time when your application's running in production. Most teams don't think about it

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I don't write a lot about database management. How come? I'm a software engineer, and like many of my peers, I leverage databases to store data. I should talk more

A few weeks ago, Tobias Macey contacted me as he wanted to talk about Gnocchi, the time series database I've been working on for the last few years. It was

A while ago, we've seen how to write a simple filtering syntax tree with Python. The idea was to provide a small abstract syntax tree with an easy to write

In the last blog post about coding style, we dissected what the state of the art was regarding coding style check in Python. As we've seen, Flake8 is a wrapper

The more you use computers, the more you see the potentials for automating everything. Who doesn't love that? By building Mergify those last months, we've decided it was time bring

After starting your first Python project, you might realize that it is actually not that obvious to be consistent with the way you write Python code. If you collaborate with