This is a running document in which I’ll answer all questions regarding the single line of Python code. It’s based on my interactive collection here but without the slow videos and embedded code shells. Let’s get started! Python One Line If Else You can use a simple if statement in a single line of code. … Read more
Summary: To access the index of iterables like lists in Python, use one of the following methods: Use enumerate() function. Use a counter variable with For Loop/While Loop. Use a list comprehension. Use the NumPy library. Use the itertools module. Introduction An index can be considered as the position of an element in an ordered … Read more
It’s quite common for your code to throw a typeerror, especially if you’re just starting out with Python. The reason for this is that the interpreter expects variables of certain types in certain places in the code. We’ll look at a specific example of such an error: “typeerror: ‘int’ object is not iterable”. Exercise: Run … Read more
A generator function is a Pythonic way to create an iterable without explicitly storing it in memory. This reduces memory usage of your code without incurring any additional costs. The following code shows a function get_numbers(n) that returns a list of n random numbers. However, this is not very efficient code because you create a … Read more
Summary: To split a string and keep the delimiters/separators you can use one of the following methods: Problem Formulation 🔏Problem: Given a string in Python; how to split the string and also keep the separators/delimiter? A sequence of one or more characters used to separate two or more parts of a given string or a … Read more
In this article, you’ll learn about two variants of this problem. Assign multiple values to multiple variables Assign the same value to multiple variables Let’s have a quick overview of both in our interactive code shell: Exercise: Increase the number of variables to 3 and create a new one-liner! Let’s dive into the two subtopics … Read more
The single line of Python code is more powerful than you may expect. In fact, you can compress whole algorithms in a single line of Python code. In this tutorial, you’ll learn how to use the built-in map() function in Python to one-linerize a critical step that would otherwise take multiple lines of Python code: … Read more
A lambda function allows you to define a function in a single line. It starts with the keyword lambda, followed by a comma-separated list of zero or more arguments, followed by the colon and the return expression. For example, lambda x, y: x+y calculates the sum of the two argument values x+y in one line … Read more
Summary: To remove items from a list while iterating, use any of the following methods. List comprehension, Reverse iteration with the remove() method, Lambda Function with the filter() method, or While loop with the copy(), pop() and append() functions. Let’s start with defining the exact problem you want to solve. Problem: Given a list. How … Read more
To sort and return a Python list in a single line of code, use the sorted(list) method that returns a new list of sorted elements. It copies only the references to the original elements so the returned list is not a deep but a shallow copy. Let’s dive into the challenge to learn about more … Read more
Article summary: Here’s a quick visual overview of the contents of this tutorial. Flat List: To sum over a list of numbers in a single line of Python code, use Python’s built-in function sum(list). Nested List: To sum over a list of lists in one line Python, use a generator expression to flatten the list … Read more
Problem: Given two variables a and b. Use a single line of Python code to swap the variables to assign the value of a to b and the value of b to a. Example: Say, you have to integers a=21 and b=42. You want to swap the variables so that a=42 and b=21. How to … Read more