Python Higher-Order and Anonymous Functions

Higher-Order Functions

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In Python, functions can be passed as arguments to other functions. A function that accepts another function as an argument is called a higher-order function, which allows for more flexible and reusable code. Example:

def calculate_and_print(num, calculator):
  result = calculator(num)
  print(f"num: {num}, result: {result}")

Anonymous Functions

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Sometimes, a function is only used once and giving it a name feels unnecessary. This is where anonymous functions come in handy:

calculate_and_print(7, lambda num: num * num)

If the function takes multiple arguments, just list them before the colon. For example: lambda num1, num2: num1 + num2

You can also call an anonymous function directly:

(lambda num1, num2: num1 + num2)(2, 3)

Note: Anonymous functions should be kept simple and concise.