Problem Statement: Consider that you have been given a list in Python. How will you count the number of unique values in the list? Example: Let’s visualize the problem with the help of an example: Given: li = [‘a’, ‘a’, ‘b’, ‘c’, ‘b’, ‘d’, ‘d’, ‘a’]Output: The unique values in the given list are ‘a’, ‘b’, ‘c’, ‘d’. … 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 … Read more
This article will show you how to retrieve a single generator element in Python. Before moving forward, let’s review what a generator does. Quick Recap Generators 💡 Definition Generator: A generator is commonly used when processing vast amounts of data. This function uses minimal memory and produces results in less time than a standard function. … Read more
Coding Challenge 💬 Coding Challenge: Given a nested Python list, i.e., a list of lists. How to convert it to a string list, so that each inner list becomes a single string? Consider the following examples: 1. Input: [[‘h’, ‘e’, ‘l’, ‘l’, ‘o’], [‘w’, ‘o’, ‘r’, ‘l’, ‘d’]] Output: [‘hello’, ‘world’] 2. Input: [[‘h’, ‘i’], … Read more
To check your Python version, run python ‐‐version in your command line (Windows), shell (Mac), or terminal (Linux/Ubuntu). To check your Python version in your script, run import sys to get the module and use sys.version to find detailed version information in your code. Let’s get a quick overview of the different ways to check … Read more
⚔️ Programming Challenge: Given an integer n that could be very high (e.g., n=1000000). How to initialize a Python dictionary of size n that is fast, easy, and efficient? Next, you’ll learn the five main ways to solve this and compare their performance at the end of this article. Interestingly, the winner Method 4 is … Read more
Quick answer: How to put a simple if-then-else statement in one line of Python code? To put an if-then-else statement in one line, use Python’s ternary operator x if c else y. This returns the result of expression x if the Boolean condition c evaluates to True. Otherwise, the ternary operator returns the alternative expression … Read more
The most basic ternary operator x if c else y consists of three operands x, c, and y. It is an expression with a return value. The ternary operator returns x if the Boolean expression c evaluates to True. Otherwise, if the expression c evaluates to False, the ternary operator returns the alternative y. Ternary … Read more
Use Python’s built-in min() function with the key argument to find the shortest string in a set. Call min(my_set, key=len) to return the shortest string in the set using the built-in len() function to determine the weight of each string—the shortest string has minimum length. 👉 Recommended Tutorial: How to Find the Shortest String in … Read more
Problem Formulation You have been given a number. How will you check if the number lies between two numbers? When you check if a number lies between two other numbers it returns a boolean that determines if the number is greater than or equal to the minimum number and also less than or equal to … Read more
Summary: Use negative step in the range() function to reverse the given sequnce as: range(start, stop, -step). Another workaround is to apply the reversed() function to the given range to reverse it as: reversed(range(start, stop)). Problem: Given a range/sequence of numbers, how will you reverse the range? Example: Given:# Given rangefor i in range(1, 6): … 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