Problem Formulation and Solution Overview This article will show you how to subtract minutes from a datetime in Python. To make it more interesting, we have the following running scenario: ToyMax has 200 employees. All employees must swipe in and out daily using a time card reader. Sometimes the employee swipe-in times do not appear … Read more
💬 Question: Given a Boolean value True or False. How to convert it to a string “True” or “False” in Python? Note that this tutorial doesn’t concern “concatenating a Boolean to a string”. If you want to do this, check out our in-depth article on the Finxter blog. Simple Bool to String Conversion To convert … Read more
Easy Solution Use the addition + operator and the built-in str() function to concatenate a boolean to a string in Python. For example, the expression ‘Be ‘ + str(True) yields ‘Be True’. The built-in str(boolean) function call converts the boolean to a string. The string concatenation + operator creates a new string by appending the … 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
Problem Formulation and Solution Overview 💡 This article will show you how to delete a line from a file in Python. To make it more interesting, we have the following running scenario: Rivers Clothing has a flat text file, rivers_emps.txt containing employee data. What happens if an employee leaves? They would like you to write … Read more
Problem Formulation and Solution Overview This article will show various ways to print a single or multiple spaces in Python. Let’s say you have strings and would like to print them out to the terminal by placing a single or multiple spaces between them. 💬 Question: How would we write code to print spaces? We … Read more
Python Shortest String in NumPy Array To find the shortest string in a given NumPy array, say arr, you can use the min(arr, key=len) function that determines the minimum by comparing the length of the array elements using the len() function as a key for comparison. You can find more about the powerful min() function … Read more
You’ll never guess the most concise way to solve this problem… 🦄 Coding Challenge 💬 Challenge: Given a dictionary with string keys. Get the string key with the minimum number of characters, i.e., the shortest string. A variant of this problem is to get the length of the shortest string — I’ll give you a … Read more
Programming Challenge 💬 Challenge: Given a Python string. Find the longest substring for which holds that all of its characters are in alphabetical order so that the first character comes earlier in the alphabet than the second character, and so on. Here are three examples: You get the point. 🙂 Next, I’ll show you three … Read more
Python Longest String in NumPy Array To find the longest string in a given NumPy array, say arr, you can use the max(arr, key=len) function that determines the maximum by comparing the length of the array elements using the len() function as a key for comparison. You can find more about the powerful max() function … Read more
💬 Challenge: Given a Pandas DataFrame. How to find the longest string in a given DataFrame column? We’re going to discuss different variants of this problem next. Let’s get started with the easiest next! Method 1: Find Length of Longest String in DataFrame Column To find the length of the longest string in a DataFrame … Read more
Coding Challenge 💬 Challenge: Given a string. How to find all palindromes in the string? For comprehensibility, allow me to quickly add a definition of the term palindrome: 💡 Definition: A palindrome is a sequence of characters that reads the same backward as forward such as ‘madam’, ‘anna’, or ‘101’. This article wants to give … Read more