Problem Formulation and Solution Overview In this article, you’ll learn how to sort words alphabetically in Python. To make it more fun, we have the following running scenario: Some English sayings, also known as Tongue-Twisters, are fun to try and say quickly. They are also used to improve non-English speaking individuals and small children’s fluency … Read more
for i j in python The Python expression for i, j in XXX allows you to iterate over an iterable XXX of pairs of values. For example, to iterate over a list of tuples, this expression captures both tuple values in the loop variables i and j at once in each iteration. Here’s an example: … Read more
Wrong Way to Create and Initialize a List of Lists in Python A standard way to initialize a flat list in Python is the multiplication operator to create a new list by repeatedly concatenating an existing list: 🌍 Related Tutorial: How to create a list in Python? Consequently, many beginner coders try to use the … Read more
💬 Question: How to convert a list of custom objects to a csv file? Example: Given is a list of custom objects of, say, type Employee that holds the name, job description, and income like so: Your goal is to write the content of the list of objects into a comma-separated-values (CSV) file format. Your … Read more
Problem Formulation and Solution Overview In this article, you’ll learn how to convert a List of Booleans to Integers. In Python, the Boolean is a built-in data type. These values represent True (1) or False (0). Also referred to as Truthy or Falsy values. In this article, we will articulate how these values behave. To … Read more
Problem Formulation and Solution Overview In this article, you’ll learn how to convert a comma-separated string into a List. Fergus, a 10-year-old boy, is learning to code with Python. As homework, the teacher has asked the class to create a comma-separated string and convert this string into a list. Fergus needs your help. 💬 Question: … Read more
Problem Formulation 💬 Question: Given a Python list stored in a variable lst. How to remove the first and last elements from the list lst? Example: The list [‘Alice’, ‘Bob’, ‘Carl’, ‘Dave’] stored in variable lst becomes [‘Bob’, ‘Carl’]. Method 1: Slicing List[1:-1] To remove the first and last elements from a Python list, use … Read more
Problem Formulation and Solution Overview In this article, you’ll learn how to split a Python List in half. To make it more fun, we have the following running scenario: Lisa is writing a report concerning Population growth for three (3) countries (the US, UK, and Germany) between 2021-2022. However, she saved it as one list … Read more
Problem Formulation and Solution Overview In this article, you’ll learn how to multiply List Elements by a Number in Python. This example multiples the first five (5) Prime Numbers by two (2) and return the result. 💬 Question: How would we write Python code to multiply the list elements? We can accomplish this task by … Read more
The TypeError: unhashable type: ‘list’ usually occurs when you try to use a list object as a set element or dictionary key and Python internally passes the unhashable list into the hash() function. But as lists are mutable objects, they do not have a fixed hash value. The easiest way to fix this error is … Read more
Problem Formulation 💬 Question: Given a list of lists (=nested list) in Python. How to convert this list of lists to a set in Python? This is not a trivial problem because Python lists are mutable and, therefore, not hashable. And because of that, they cannot be converted to a set using the direct set() … Read more
Problem Formulation and Solution Overview In this article, you’ll learn how to convert a String representation of a list consisting of multiple numbers to a list of integers in Python. 🌎 Related Tutorial: How to convert a list of integers to a list of strings in Python? To make it more fun, we have the … Read more