Lambda functions in Python are small, anonymous functions defined using the lambda keyword. Unlike regular functions, they do not have a name and are typically used for short, one-time operations. A lambda function can take multiple arguments but can only contain a single expression. The syntax is straightforward: lambda arguments: expression. For example, lambda x: x**2 defines a function that squares its input ⁴.

These functions are particularly useful in scenarios where you need a quick, throwaway function, such as when using built-in functions like map(), filter(), and sorted(). For instance, you can use a lambda function to filter even numbers from a list with filter(lambda x: x % 2 == 0, numbers) ⁴⁵.

Lambda functions help keep your code concise and readable, making them a valuable tool in Python programming ⁵.

If you have more questions about lambda functions or their applications, feel free to ask!