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17.5. Creating a Procedure with Parameters

Is there another way to make it easy to change the story, rather than creating a string and then splitting it into pieces? We can create a procedure with parameters and then pass in the input values when we call the procedure as shown below.

def witchStory (firstName, lastName, gender, address, verb): # create the story start = "Once there was a " + gender + " named " + firstName + "." next1 = "A good " + gender + " living at " + address + "." next2 = "One day, a wicked witch came to the " + lastName + " house." next3 = "The wicked witch was planning to " + verb + " " + firstName + "!" ending = "But " + firstName + " was smart and avoided the wicked witch." # print the story print(start) print(next1) print(next2) print(next3) print(ending) # call the procedure witchStory("Abe", "Brown", "boy", "1313 Maple Lane", "trick")

Creating a procedure with parameters makes it easy to customize the madlib stories without having to split a string. The split function is very useful when you read data from a file or from a website.

What would be the value of lastName in witchStory given the following call to the procedure?

witchStory("Emily", "Smith", "girl", "2783 Main Street", "smell")

• Emily
• That is the value of firstName.
• Smith
• That is the value of lastName.
• girl
• That is the value of gender.
• 2783 Main Street
• That is the value of address.
• smell
• That is the value of verb.

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