Python Callable Functions

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It’s basically a block of code that you can reuse over and over again, instead of copying and pasting it every time. Kinda like how you don’t have to write your name by hand on every single piece of paper

A callable function is a type of function that can be called (duh) with arguments, just like a spell caster calling upon their favorite spells. You see, in Python, functions are objects too and they have the ability to be assigned to variables or passed as arguments to other functions

Here’s an example:

# This function is defined with the name "add_numbers" and takes two arguments, x and y
def add_numbers(x, y):
    # The function returns the sum of x and y
    return x + y

# The function is called with the arguments 5 and 10 and the result is assigned to the variable "result"
result = add_numbers(5, 10)

# The result is printed to the console
print(result) # Output: 15

In this case, we defined a function called `add_numbers`, which takes two arguments (`x` and `y`) and returns their sum. We then assigned the result of calling that function to a variable called `result`. The output is printed on our screen

But wait, there’s more magic in store for us! Callable functions can also be passed as arguments to other functions this is known as higher-order functions. Let me show you an example:

# Defining a function called "multiply_by" that takes in a parameter "x"
def multiply_by(x):
    # Defining a nested function called "inner" that takes in a parameter "y"
    def inner(y):
        # Returning the product of "x" and "y"
        return x * y
    # Returning the nested function "inner"
    return inner

# Calling the "multiply_by" function with an argument of 5 and assigning the returned function to a variable called "result"
result = multiply_by(5)

# Printing the result of calling the function stored in the "result" variable with an argument of 10
print(result(10)) # Output: 50

In this case, we defined a function called `multiply_by`, which takes an argument (`x`) and returns another function that multiplies its own input by the value of `x`. We then assigned the result of calling `multiply_by(5)` to a variable called `result`. The output is printed on our screen

They’re like spells that can be reused and passed around like hotcakes at a pancake festival

my friends!

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