This tutorial will show you how to convert an But let’s quickly recap what an octal escape sequence is in the first place! π What Is An Octal Escape Sequence?π‘ An Octal Escape Sequence is a backslash followed by 1-3 octal digits (0-7) such as \150 which encodes the ASCII character ‘h’. Each octal escape … Read more
π¬ Question: How to use Python’s string formatting capabilities — f-strings, percentage operator, format(), string.format() — to convert an integer to a hexadecimal string? Lowercase Solution without ‘0x’ Prefix You can convert an integer my_int to a simple lowercase hex string without ‘0x’ prefix by using any of the four string formatting variants—all based on … Read more
Quick answer: π Use the f-string expression f’0x{val:X}’ to convert an integer val to a hexadecimal string using uppercase hex letters as set by the capitalized hex format specifier X. Optionally, you can add the prefix ‘0x’ in front of this. Example: π‘ Note: This is Method 3 of this tutorial, and it is presented … Read more
Problem Formulation Given a hex string, i.e., a string of hexadecimal digits like so: 01ffa87135affcd45deebe You want to convert a batch of k hex digits to an integer. For example with k=2, you obtain the following batches of two hex digits each: 01 ff a8 71 35 af fc d4 5d ee be Now, convert … Read more
What Is Big/Little Endian? Computers perform computations on data that is represented with bytes, i.e., sequences of 0s and 1s. A computer program manipulates data by loading data from memory (RAM, Cache, Disk, SSD), performing computations based on that data, and storing the resulting data back into the memory. A computer program loads and stores … Read more
π¬ Question: How to convert a given hex string such as ‘0xF’ to a binary number such as ‘0b1111′? There are multiple variants of this problem depending on how you want the conversion and from which type to which type. In this article, we’ll go over the different methods from simple to more sophisticated. Let’s … Read more
π¬ Question: Given a hexadecimal string such as ‘0xf’ in Python. How to convert it to a hexadecimal number in Python so that you can perform arithmetic operations such as addition and subtraction? The hexadecimal string representation with the ‘0x’ prefix indicates that the digits of the numbers do have a hexadecimal base 16. In … Read more
The Leibniz formula to calculate an approximation of the value of Ο is an infinite alternating series that adds and subtracts smaller and smaller terms of the form 1/x until it converges to the value of Ο/4. You can then multiply the result by 4 to obtain an approximation of Ο. Here’s the simple formula … Read more
Problem Formulation Given an integer number. How to sum over all digits of this number to compute the crossfoot (cross total)? Consider the following examples: 12 –> 1+2 = 3 123 –> 1+2+3 = 3 244 –> 2+4+4 = 10 981223 –> 9+8+1+2+2+3 = 25 Method 1: sum() with Generator Expression The Python built-in sum(iterable) … Read more
Coding Challenge βοΈ Challenge: Given an integer d representing the number of digits. How to create a random number with d digits in Python? Here are three examples: my_random(2) generates 12 my_random(3) generates 389 my_random(10) generates 8943496710 I’ll discuss three interesting methods to accomplish this easily in Python—my personal favorite is Method 2! Shortest Solution … Read more
In data science, you will need to learn how to generate random numbers, which in Python, we can do with the random module. In this tutorial, you’ll learn how to solve the following programming challenge: βοΈ Challenge: How to do random sampling from a list in Python? Without further ado, let’s dive right into it! … Read more
Problem Formulation and Solution Overview This article will show you how to generate password hashes in Python. To make it more interesting, we have the following running scenario: When new users join the Finxter Academy, they are asked for a password. How can we keep this data secure? To secure these passwords, we must convert … Read more