Problem Formulation and Solution Overview This article will show you how to add elements to a Python set. ℹ️ Info: A Python set is a collection of unique item(s) saved in no particular order (unordered). A set cannot be changed. However, elements can be added and removed. Sets can also perform calculations like union, intersection, … Read more
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
The most Pythonic way to print a dictionary except for one or multiple keys is to filter it using dictionary comprehension and pass the filtered dictionary into the print() function. There are multiple ways to accomplish this and I’ll show you the best ones in this tutorial. Let’s get started! 🚀 👉 Recommended Tutorial: How … Read more
Basic Solution To create a set of n elements, pass a list or another iterable of n initial elements into the set() function. For example, set(range(n)) creates the set of n consecutive integers {1, 2, …, n-1}. You can then add and remove the elements using the normal set methods such as add() or pop(). … 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: Given a Python set. How to convert it to a tuple? And how to convert the tuple back to a set? There are three main ways: Method 1: To convert a Python set to a tuple, use the tuple(my_set) function. Method 2: To convert a Python tuple to a set, use the … Read more
There are three main ways to check if a set is empty: Implicit: Pass the set into a Boolean context without modification. Python will automatically convert it to a Boolean using bool(). Explicit: Pass the set into the bool() Function. Comparison: Compare the set with the empty set like so: my_set == set() Let’s dive … Read more
Use Python’s built-in max() function with the key argument to find the longest string in a set. Call max(my_set, key=len) to return the longest string in the set using the built-in len() function to determine the weight of each string—the longest string has maximum length. 👉 Recommended Tutorial: How to Find the Longest String in … Read more
Minimal Error Example Given the following minimal example where you create a set and attempt to access an element of this set using indexing or slicing: If you run this code snippet, Python raises the TypeError: ‘set’ object is not subscriptable: Why Does the Error Occur? The Python TypeError: ‘set’ object is not subscriptable occurs … 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 find the 2nd largest List element in Python. To make it more fun, we have the following running scenario: Rivers Clothing is currently reviewing its projected earnings for the next six (6) months. As their IT Specialist, you saved this data in a … Read more