Problem Formulation and Solution Overview This article will show you how to find the most common element in a Python Dictionary. However, since all Dictionary Keys are unique, this article focuses on searching for the most common Dictionary Value. To make it more fun, we have the following running scenario: Marty Smart, a Math Teacher … Read more
💬 Question: How to convert a dictionary to a CSV in Python? In Python, convert a dictionary to a CSV file using the DictWriter() method from the csv module. The csv.DictWriter() method allows you to insert a dictionary-formatted row (keys=column names; values=row elements) into the CSV file using its DictWriter.writerow() method. 🌍 Learn More: If … Read more
Problem: How to convert a list of dictionaries to a csv file? Example: Given is a list of dicts—for example salary data of employees in a given company: Your goal is to write the content of the list of dicts into a comma-separated-values (CSV) file format. Your out file should look like this: my_file.csv: Name,Job,Salary … Read more
Problem Formulation and Solution Overview In this article, you’ll learn how to get the first Key and Value from a key:value pair in a Python Dictionary. A Dictionary in Python is used to store information in a key:value pair format. These pairs are modifiable and do not allow duplicates. 💡 Note: In theory, the dictionary … Read more
Problem Formulation and Solution Overview In this article, you’ll learn how to increment a dictionary value in Python. To make it more fun, we have the following running scenario: Trinity Bank keeps track of its latest mortgage rates in a Dictionary format. Recently there has been a steady increase in rates. How would Trinity Bank … 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 What is the most Pythonic way to convert a CSV file to a list of dictionaries, a list of tuples, and a list of lists? Let’s go over those challenges one by one. 💫 Note: I only show you the most Pythonic solution to each problem — based on my personal opinion — … Read more
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