What are lambda functions?

Lambda functions are anonymous functions that can be defined directly at the point of use without needing to give them a name. In QA Automation, they are often used for concise writing of callback functions, filtering, sorting, or passing logic to methods.

For example, in Python, a lambda function looks like this:

# Regular function
def add(x, y):
    return x + y

# Lambda function
add = lambda x, y: x + y

print(add(2, 3))  # Outputs 5

In tests, lambda functions help write compact and readable code, for example, for condition checks or result processing.