Instead of using def keyword, we use lambda keyword to construct a function. It is because lambda functions do not require a name when it is defined, unlike regular functions. In this function’s body, we have only one line of code. In Python, an anonymous function is determined using lambda keyword. Python Lamda function is used as anonymous function. Suppose we want to print a Hello in the body of a function printhello(). In Python there is a specific function that is called Python Lambda function.

When you have only a single statement to execute in your Python Lambda function A lambda function in Python has the following syntax: lambda parameters: expression. Python Lambda expression isn’t necessary, but it’s handy in certain situations. A lambda function is an anonymous function (i.e., defined without a name) that can take any number of arguments but, unlike normal functions, evaluates and returns only one expression. The value of this expression is what it returns after evaluating. Like we’ve seen so far, Python lambda expression may take arguments, and takes one expression. Python allows you to create anonymous function i.e function having no names using a facility called lambda function. When to Use Which Lambda Expression in Python? Other things like an assignment statement cannot be provided as an expression to Python lambda because it does not return anything, not even None. Arithmetic operations like a+b and a**b.

The following items qualify as expressions. 1 What Exactly is an Expression in Python?Īs we’ve seen, the expression is what the Python3 lambda returns, so we must be curious about what qualifies as an expression.Īn expression here is what you would put in the return statement of a Python Lambda function.