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
[toc] 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 … 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
[toc] Problem Statement: How to get unique values from a list in Python? While working with lists, quite often, there are many duplicate items present in it. There can be situations where you may need to eliminate these duplicate values and retain unique values within the list. So, how do we achieve this feat? Hence, … Read more
[toc] Summary: Use these methods to delete a dictionary element in Python –(1) del dict[‘key’](2) dict.clear(‘key’)(3) Use a dictionary comprehension(4) Use a for loop to eliminate the key Problem: Given a Python dictionary. How to delete an element from the dictionary? Example: A Quick Recap to Python Dictionaries A Python dictionary is a data structure … Read more
This article addresses two problems: Given is a dictionary and a single key. How to get the length of the value associated with the key in the dictionary? Given is a dictionary. How to get the total length, summing over the length of all values in the dictionary? Let’s dive into these two problems and … Read more
This article shows you how to apply a given function to each element of a Python dictionary. The most Pythonic way to apply a function to each element of a Python dict is combining the dictionary comprehension feature and the dict.items() method like so: {k:f(v) for k,v in dict.items()} Note: All the solutions provided below … Read more
Syntax object.__missing__(self, key) The __missing__(self, key) method defines the behavior of a dictionary subclass if you access a non-existent key. More specifically, Python’s __getitem__() dictionary method internally calls the __missing__() method if the key doesn’t exist. The return value of __missing__() is the value to be returned when trying to access a non-existent key. We … Read more