Python’s built-in hash(object) function takes one object as an argument and returns its hash value. As the hash value is calculated based on the object’s data, two different but equal objects must have the same hash value. It doesn’t follow, though, that two objects with the same hash value are equal—they can have the same … Read more
Hey Finxters!! It is time for another cheat sheet!! Cheat sheets are super helpful if you are looking to become a Python freelancer. Some of the basics need to be condensed and learned quickly to get you on your way. You will also need to know the IDE you are working with and their shortcuts. … Read more
Python’s built-in hex(integer) function takes one integer argument and returns a hexadecimal string with prefix “0x”. If you call hex(x) on a non-integer x, it must define the __index__() method that returns an integer associated to x. Otherwise, it’ll throw a TypeError: object cannot be interpreted as an integer. Argument integer An integer value or … Read more
Problem Formulation: Say, you set an environment variable and you want to access it in your Python script. How to get the value of the environment variable? Background: Environment variables are external to the Python environment. They describe the operating system environment we are using. The applications installed use this information to complete specific tasks … Read more
Python’s built-in oct(integer) function takes one integer argument and returns an octal string with prefix “0o”. If you call oct(x) on a non-integer x, it must define the __index__() method that returns an integer associated to x. Otherwise, it’ll throw a TypeError: object cannot be interpreted as an integer. Argument integer An integer value or … Read more
The np.arange() function appears in 21% of the 35 million Github repositories that use the NumPy library! This illustrated tutorial shows you the ins and outs of the NumPy arange function. So let’s get started! What’s the NumPy Arange Function? The np.arange([start,] stop[, step]) function creates a new NumPy array with evenly-spaced integers between start … Read more
Problem Formulation: How to plot the confidence interval in Python? To plot a filled interval with the width ci and interval boundaries from y-ci to y+ci around function values y, use the plt.fill_between(x, (y-ci), (y+ci), color=’blue’, alpha=0.1) function call on the Matplotlib plt module. The first argument x defines the x values of the filled … Read more
Hey Finxters! We all need cheat sheets for Python and all its intricacies. Python has many libraries and there are so many IDE applications you can use with it! One of these IDEs is called Pycharm! I want to introduce you to some of Pycharms shortcuts! Let’s get started right away! Full PyCharm Tutorial Finxter … Read more
In this tutorial you will learn about doubly linked list. You will learn how to implement a doubly linked list in Python. A doubly linked list, unlike a singly linked lists consists of a data value along with a next and previous pointer. Let us see a simple example of a doubly linked list. In … Read more
In this tutorial, you’ll learn how to open a PDF file in an external PDF reader or the browser, using a simple Python command. There are many variants to this problem, so let’s dive right into the different ones—and their solutions! Method 1: Open PDF Standard Viewer with os.system(path) — With CMD You can open … Read more
This chapter draft from my upcoming book “From One to Zero: Minimalism in Programming” will appear in revised form in 2021 with NoStarch (SanFrancisco). Stay tuned for updates on the book launch: In this chapter, you’ll enter a vital area in computer science that greatly benefits from a minimalistic mindset: design and user experience (UX). … Read more
This tutorial will show you how to convert a Unicode string to a string in Python. If you already know about Unicode, you can skip the following background section and dive into the problem right away. Background Unicode A bit about Unicode from Wikipedia. Unicode is a character encoding standard that includes characters from almost … Read more