{"id":493,"date":"2020-10-13T02:54:47","date_gmt":"2020-10-13T02:54:47","guid":{"rendered":"https:\/\/www.pythontutorial.net\/?page_id=493"},"modified":"2025-03-26T14:56:44","modified_gmt":"2025-03-26T14:56:44","slug":"python-lambda-expressions","status":"publish","type":"page","link":"https:\/\/www.pythontutorial.net\/python-basics\/python-lambda-expressions\/","title":{"rendered":"Python Lambda Expressions"},"content":{"rendered":"\n

Summary<\/strong>: in this tutorial, you’ll learn about Python lambda expressions and how to use them to write anonymous functions.<\/p>\n\n\n\n

Sometimes, you need to write a simple function<\/a> that has only one expression. However, you need to use this function once. Therefore, it is unnecessary to define that function for this purpose.<\/p>\n\n\n\n

That’s where the Python lambda expressions come into play.<\/p>\n\n\n\n

What are Python lambda expressions #<\/a><\/h2>\n\n\n\n

Python lambda expressions allow you to define anonymous functions.<\/p>\n\n\n\n

Anonymous functions are functions without names. The anonymous functions are useful when you need to use them once.<\/p>\n\n\n\n

A lambda expression typically contains one or more arguments, but it can have only one expression<\/strong>.<\/p>\n\n\n\n

The following shows the lambda expression syntax:<\/p>\n\n\n

lambda<\/span> parameters: expression<\/code><\/span>Code language:<\/span> Python<\/span> (<\/span>python<\/span>)<\/span><\/small><\/pre>\n\n\n
It’s equivalent to the following function without the \"anonymous\"<\/code> name:<\/p>\n\n\n
def<\/span> anonymous<\/span>(parameters)<\/span>:<\/span>\n    return<\/span> expression<\/code><\/span>Code language:<\/span> Python<\/span> (<\/span>python<\/span>)<\/span><\/small><\/pre>\n\n\n
Python lambda expression examples #<\/a><\/h2>\n\n\n\n
In Python, you can pass a function to another function or return a function from another function.<\/p>\n\n\n\n
Functions that accept a function example #<\/a><\/h3>\n\n\n\n
The following defines a function called get_full_name()<\/code> that format the full name from the first name and last name:<\/p>\n\n\n
def<\/span> get_full_name<\/span>(first_name, last_name, formatter)<\/span>:<\/span>\n    return<\/span> formatter(first_name, last_name)<\/code><\/span>Code language:<\/span> Python<\/span> (<\/span>python<\/span>)<\/span><\/small><\/pre>\n\n\n
The get_full_name()<\/code> function accepts three arguments:<\/p>\n\n\n\n