ChrisSummary: The most Pythonic way to define a function in a single line is to (1) create an anonymous lambda function and (2) assign the function object to a variable name. You can then call the function by name just like any other regularly-defined function. For example, the statement f = lambda x: x+1 creates … Read more
Crafting beautiful Python one-liners is as much an art as it is a science. In this tutorial, you’ll learn how to compress an if statement without an else branch into a single line of Python code. Problem: What’s the one-liner equivalent of the simple if statement without an else branch? Here’s an example: You may … Read more
The numpy.polymulx function multiplies the polynomial c with a value x which is the independent variable. Arguments Type Description c array_like or poly1d object The input polynomials to be multiplied The following table shows the return value of the function: Type Description Return Value ndarray or poly1d object The polynomial resulting from the multiplication of … Read more
This article compiles a list of little surprises in the Python programming language. Check out the following Instagram post to see them in an interactive mode (swipe right). View this post on Instagram A post shared by The Python Blog (@finxter.com_) on Nov 11, 2019 at 10:35pm PST Here are the best easter eggs: The … Read more
Problem: Given a string and a filename. How to write the string into the file with filename using only a single line of Python code? Example: You have filename ‘hello.txt’ and you want to write string ‘hello world!’ into the file. How to achieve this? In this tutorial, you’ll learn four ways of doing it … Read more
Summary: To use an elif branch in the ternary operator, use another ternary operator as the result of the else branch (nested ternary operator). The nested ternary operator x if c0 else y if c1 else z returns x if condition c0 is met, else if (elif) condition c1 is met, it returns y, else … Read more
What if you have a ternary operator that’s very long? Problem: How to write the ternary operator in multiple lines? Short Recap: Ternary Operator Ternary Operator: The most basic ternary operator x if c else y consists of three operands x, c, and y. It is an expression with a return value. The ternary operator … Read more
Problem: How to write the ternary operator in a lambda function? Example: Say, you’ve got the following example: The function f(x) takes one argument x and increases it by 10% if the argument is larger than 100. Otherwise, it increases it by 5%. In this article, you’ll learn how to convert this code snippet into … Read more
Problem: Given a dictionary and a key. Can you use the ternary operator to return the key from the dictionary, but only if it exists to avoid the key error? If the key doesn’t exist, a “fall-back” function should be executed. Example: Say, you want to do something like the following (pseudocode): Ternary Operator Short … Read more
Do you want to learn Python but you’re overwhelmed and you don’t know where to start? Learn with Python cheat sheets! They compress the most important information in an easy-to-digest 1-page format. Here’s the new Python cheat sheet I just created—my goal was to make it the world’s most concise Python cheat sheet!
You may know the ternary operator x if c else y in Python which reads as “return x if c else return y“. But you may not know that you can also write the ternary operator in a shorter form as (y, x)[c]. Let’s dive into this concise way of hacking your own ternary operator! … Read more
In this one-liner tutorial, you’ll learn about the popular sorting algorithm Quicksort. Surprisingly, a single line of Python code is all you need to write the Quicksort algorithm! Problem: Given a list of numerical values (integer or float). Sort the list in a single line of Python code using the popular Quicksort algorithm! Example: You … Read more