The lambda keyword in Python provides a shortcut for declaring small anonymous functions. Lambda functions behave just like regular functions declared with the def keyword. They can be used whenever function objects are required.

Why are lambdas useful?

Why are lamdas functions useful? Once you understand that lambda functions are like normal functions without names and written with single expressions it is a time to explain why they are useful. They become useful when you want to use functions that take another function as an argument.

What is the work of lambda in Python?

Simply put, a lambda function is just like any normal python function, except that it has no name when defining it, and it is contained in one line of code. A lambda function evaluates an expression for a given argument. You give the function a value (argument) and then provide the operation (expression).