What is the output of this code snippet? Recursion is a powerful tool in your coding toolbox. Understanding it is a key skill on your path to mastery. Stephen Hawking used a concise explanation: “to understand recursion, one must first understand recursion.” This puzzle uses indirect recursion where a function f calls a function g … Read more
What is the output of this code snippet? The string format function is a useful feature that is new in Python 3. Use it to programmatically insert variable values into the string. Without the format function, you must break the string into a series of smaller substrings and concatenate them. For example, the last line … Read more
🛑 Note: Python has zero-based indexing, i.e., the index of the first element is 0, and the index of the i-th element is (i-1). Not considering zero-based indexing but assuming the i-th element has index i is a common source of bugs! Here’s an example that demonstrates how list indexing works in Python: 🏃 Training … Read more
What is the output of this code snippet? You will use or have already used the operations introduced in this puzzle. They are elementary pieces of knowledge for any Python programmer. First, we have the two dictionaries mapping an account name to the number of followers. For example, Cristiano Ronaldo (key: “@cristiano”) has 120 million … Read more
What is the output of this code snippet? This puzzle demonstrates that parameters are called by object in Python. What does that mean? We look into two functions depreciation1 and depreciation2. The functions take an asset value or a list of asset values as inputs. They depreciate this value by multiplying it with the depreciation … Read more
What is the output of this code snippet? This puzzle introduces a powerful tool for your Python toolbox. Make sure, you feel comfortable using it because many advanced puzzles depend on it. The name of the tool is indexing. In Python, you can access every character in the string by using an integer value which … Read more
What is the output of this code snippet? The majority of people solve this puzzle correctly. Even so, the first goal of this puzzle is to introduce the concept of variables. Python evaluates the result of the expression on the right side of the equation and stores it in the variable x. After defining the … Read more
What is the output of this code snippet? The Python interpreter is a powerful tool. In this puzzle, it acts as a simple calculator. It takes a basic mathematical expression and calculates the result. The syntax of maths expressions is straightforward: use the operators +, -, * and / exactly as you have learned them … Read more
What is the output of this code snippet? This puzzle introduces two basic concepts. First, variables can hold strings. In fact, variables can hold any data type. The interpreter determines the data type of a variable at runtime. The data type of a variable can change: you can assign a string to a variable, followed … Read more
I’m not a (medical) doctor. But many studies show that a high level of Omega 3 in your blood leads to a longer and healthier life: “Higher circulating individual and total [Omega 3] levels are associated with lower total mortality.” [1] But which foods do contain the highest levels of Omega 3? Solve this Python … Read more
For my new book “Python Brain Games” (to appear in 2019, follow my email training program to get updates), I’m experimenting with a new code puzzle type: logics puzzles and brain games. It’s like Sudoku for coders! ?? Can you solve these five puzzles in five minutes? You can find the solutions at the end … Read more
Yesterday, I found this email in my INBOX — sent by Finxter Muhammad, one of my most loyal “Coffee Break Python” email readers: ~~~ I have good news I got a job as a Python programmer in a software house.All credit goes to you – Your daily puzzles made me good in Python….. ~~~ While … Read more