Python tutorials

Early speed optimizations aren’t premature

As you code, you might have a coworker, or friend, or a little voice in your head, reminding you of Knuth’s famous saying: “premature optimization is the root of all evil.” But what makes an optimization premature, anyway? The short answer is that this aphorism is a tautology. “Premature” means “too early,” so we can rephrase the point as “doing things at the wrong time isn’t ideal.” Can’t argue with that! The problem with this saying is that many people […]

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How to Get the First Match From a Python List or Iterable

At some point in your Python journey, you may need to find the first item that matches a certain criterion in a Python iterable, such as a list or dictionary. The simplest case is that you need to confirm that a particular item exists in the iterable. For example, you want to find a name in a list of names or a substring inside a string. In these cases, you’re best off using the in operator. However, there are many […]

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