💬 Question: How to return one or multiple arguments from a Python function? Basically, creating a function that reflects one or more arguments like a mirror: Let’s find out! 👇 Method 1: Return Single Argument A function can return a single argument by passing that argument variable after the return keyword. If the argument name … Read more
Question 💬 Question: Can you use lists as values of a dictionary in Python? This short article will answer your question. So, let’s get started right away with the answer: Answer You can use Python lists as dictionary values. In fact, you can use arbitrary Python objects as dictionary values and all hashable objects as … Read more
Problem Formulation and Solution Overview This article will show you how to change tuple values in Python. To make it more interesting, we have the following running scenario: Eddie, the Meteorologist at NTCV, has calculated an incorrect five (5) Day weather forecast. These values are saved as a Tuple and require updating. 💬 Question: How … 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
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
Problem Formulation and Solution Overview This article will show you how to access and retrieve tuple Elements from a List of Tuples in Python. 💡 Definition: Python Tuples are a type of Data Structure similar to Lists. However, Tuples are enclosed in round brackets () and are immutable, whereas Lists are enclosed in square brackets … Read more
for i j in python The Python expression for i, j in XXX allows you to iterate over an iterable XXX of pairs of values. For example, to iterate over a list of tuples, this expression captures both tuple values in the loop variables i and j at once in each iteration. Here’s an example: … 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
Problem Formulation Given a CSV file (e.g., stored in the file with name ‘my_file.csv’). INPUT: file ‘my_file.csv’ 9,8,7 6,5,4 3,2,1 Challenge: How to convert the CSV file to a list of tuples, i.e., putting the row values into the inner tuples? OUTPUT: Python list of tuples [(9, 8, 7), (6, 5, 4), (3, 2, 1)] … Read more
In this article, you’ll learn about the following topics: List unpacking in Python Tuple unpacking in Python String unpacking in Python ValueError: too many values to unpack (expected k) ValueError: not enough values to unpack (expected x, got y) Unpacking nested list or tuple Unpacking underscore Unpacking asterisk Sequence Unpacking Basics Python allows you to … 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: How to convert one or more tuples to a csv file? Example: Given is a tuple or list of tuples—for example, salary data of employees in a given company: Your goal is to write the content of the list of tuples into a comma-separated-values (CSV) file format. Your out file should look like this: … Read more