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Learn Python: Function Arguments
Unpacking Multiple Returns

A Python function can return multiple things. This is especially useful in cases where bundling data into a different structure (a dictionary or a list, for instance) would be excessive. In Python we can return multiple pieces of data by separating each variable with a comma:

def multiple_returns(cool_num1, cool_num2): sum_nums = cool_num1 + cool_num2 div_nums = cool_num1 / cool_num2 return sum_nums, div_nums

Above we created a function that returns two results, sum_nums and div_nums. What happens when we call the function?

sum_and_div = multiple_returns(20, 10) print(sum_and_div) # Prints "(30, 2)" print(sum_and_div[0]) # Prints "30"

So we get those two values back in what’s called a tuple, an immutable list-like object indicated by parentheses. We can index into the tuple the same way as a list and so sum_and_div[0] will give us our sum_nums value and sum_and_div[1] will produce our div_nums value.

What if we wanted to save these two results in separate variables? Well we can by unpacking the function return. We can list our new variables, comma-separated, that correspond to the number of values returned:

sum, div = sum_and_div(18, 9) print(sum) # Prints "27" print(div) # Prints "2"

Above we were able to unpack the two values returned into separate variables.

Instructions

1.

In script.py you’ll find the definition of the function scream_and_whisper(). Call the function with a string of your choice and store the results in the_scream and the_whisper.

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