If you’ve been learning Python long enough, then you’ve likely seen or heard about the Zen of Python. Experienced Pythonistas often refer to it as a source of wisdom and guidance, especially when they want to settle an argument about certain design decisions in a piece of code. Others take these principles even more seriously by considering them a sort of Pythonic decalogue. In this tutorial, you’ll learn where to find the Zen of Python, how it came into existence, […]

Once you have a NumPy array, regardless of whether you’ve generated it randomly or obtained it from a more ordered source, there may be times when you need to select elements from it randomly or reorder its structure randomly. You’ll learn how to do this next. Selecting Array Elements Randomly Suppose you have a NumPy array of data collected from a survey, and you wish to use a random sample of its elements for analysis. The Generator object’s .choice() method […]

So far, you’ve learned how to extract text and pages from PDFs and how to concatenate and merge two or more PDF files. These are all common operations with PDF files, but pypdf has many other useful features. In the following sections, you’ll learn how to rotate and crop pages in a PDF file. Rotating Pages With PageObject.rotate() You’ll start by learning how to rotate pages. For this example, you’ll use the ugly.pdf file in the practice_files/ folder. This file […]