Python has list comprehension and dictionary comprehension as a concise way to create a list or a dictionary by modifying an existing iterable. Python also has generator expressions that allow you to create an iterable by modifying and potentially filtering each element in another iterable and passing the result in a function, for instance. Does … Read more
Problem Formulation and Solution Overview In this article, you’ll learn how to reverse a Dictionary in Python. To make it more fun, we have the following running scenario: We have a Python Dictionary containing three (3) users who are signed up at the Finxter Academy. The current key:value pairs consist of username:id. The owner would … Read more
To update a key in a dictionary if it doesn’t exist, you can check if it is present in the dictionary using the in keyword along with the if statement, and then update the key-value pair using subscript notation or update() method or the asterisk * operator. This approach will be examined in Section 1 … Read more
Problem Formulation and Solution Overview In this article, you’ll learn how to Sum Dictionary Values in Python. To make it more fun, we have the following running scenario: As a Python Freelancer, you would like to know how much money you made over the past few months. This data is stored in a Dictionary format. … Read more
Problem Formulation and Solution Overview In this article, you’ll learn how to access a Dictionary key by index in Python. To make it more fun, we have the following running scenario: Rivers Clothing has a list of Employees. They would like to find the name of their youngest staff member. They know this person is … Read more
Problem Formulation and Solution Overview In this article, you’ll learn how to find the maximum value in a Python dictionary. To make it more fun, we have the following running scenario: You are in the market for a car and have narrowed the search to a few possibilities. Your final choice will be based on … Read more
Problem Formulation and Solution Overview In this article, you’ll learn how to convert a Dictionary into a NumPy array in Python. Example: Input Dictionary: {2017: 74, 2018: 80, 2019: 84, 2020: 73, 2021: 79} Output NumPy Array: [[2017 74] [2018 80] [2019 84] [2020 73] [2021 79]] To make it more fun, we have the … Read more
Problem Formulation and Solution Overview In this article, you’ll learn how to create a Dictionary from two (2) Lists in Python. To make it more fun, we have the following running scenario: Biogenix, a Lab Supplies company, needs to determine the best element from the Periodic Table for producing a new product. They have two … Read more
Problem Formulation and Solution Overview In this article, you’ll learn how to read in a Dictionary file and format the output in Python. To make it more fun, we have the following running scenario: Jeff Noble, a Marine Archeologist, has put together a team to search for shipwrecks each month. This month, they will search … Read more
Problem Statement: How to get a key by its value in a dictionary in Python Example: We have a clear idea about the problem now. So without further delay, let us dive into the solutions to our question. 🎬Video Walkthrough Solution 1: Using dict.items() Approach: One way to solve our problem and extract the key … Read more
I have spent my morning hours on an important mission. What is the cleanest, fastest, and most concise answer to the following question: 💬 How do you find the key with the maximum value in a Python dictionary? Most answers on the web say you need to use a library but this is not true! … Read more
If we have to work with data in the form of key-value pair we know that the right Python data type (structure) to perform this is a Python dictionary. Below we show a way to define a little python dictionary called “d”. The dictionary keys can be several types of data, but not a list … Read more