Python 3 latest code crumbs

There’s no magic to creating your own iterator. I’ll demonstrate with a simple iterator class that returns even numbers. As we’ve learned, we need to implement __iter__ and __next__. We’ll do this in one single class, to keep things simple....

As you hopefully know, we can't divide by the number zero. If we do so anyway, Python will throw an exception called ZeroDivisionError, which is a subclass of ArithmeticError. When can catch this exception with a Python try except block....

If you need to convert YAML to JSON, you can simply parse the YAML as we did above. In the next step, you can use the JSON module to convert the object to JSON. In this example, we open a...

Although most will only read YAML as a configuration file, it can be very handy to write YAML as well. In the following example, we'll: * Create a list with names as we did before * Save the names to...

The finally block is executed regardless of whether an exception occurs or not. Finally blocks are useful, for example, when you want to close a file or a network connection regardless of what happens. After all, you want to clean...

With this neat little trick, you can swap two Python variables without using a third variable. Source: python.land blog...