Time flies! It feels like I've just started Python Friday. And yet this is already the 100th post for this series. Today I look back on the last 99 posts and create an easy-to-use reference that lets you jump right to the topic you are interested in.
For a feature I build I needed a simple way to reverse the direction the for-statement iterates through a list. As it turns out, Python has a built-in function called reversed() that does exactly that.
Python allows us to run other applications from our code. That helps us to reuse existing tools as part of our automation. Let's look how we can do that.
When you use a Python script to automate things, you may not always want to stay in the directory you run your script from. Let us look how we can change the current working directory and save a lot of typing.
Your Git repository is a treasure trove of data about your project. Every commit you make tells a part of the story of your project. Would it not be great to run some analysis on it to see hidden pattern or learn about the dynamics at work?
If you work with web technologies these days, there is no way around JSON. Today we look at the basic operations to serialize our objects to JSON and turn JSON back into objects.
Sometimes the collection of data takes a lot longer than processing it. Wouldn't it be great if you could store whole Python objects? If something goes wrong, we can restart the analytics part and don't need to recreate the data.
If you try out a Python package in the REPL, the output of print() may not be the most useful one. In Ruby I used for this case the class PrettyPrint and as it turns out, Python has a similar built-in feature. Let's have a look.
SQLAlchemy is a massive database toolkit that you can use in various ways. Let us do a recap on the options you have and look for a good starting point for your situation.
The mapping for SQLAlchemy ORM takes a lot of initial work – often too much work for just a few queries against an existing database. However, there is an extension that offers a quicker way to work with a rudimentary object model and the nice parts of ORM.