Chapter 17 Exercises¶

1. Fix 6 syntax errors in the code below so that the code runs correctly. It will print a story.

   # initialize the variables first_name = "Pat' last_name = "Smith" gender = girl" address = "65 Elm Street verb = "eat" # create the story start = "Once there was a " gender + " named " + first_name + "." next1 = "A good " + gender + " living at " address + "." next2 = "One day, a wicked witch came to the " + last_name + " house." next3 = "The wicked witch was planning to " + verb + " " + first_name + "!" ending = "But " + firstname + " was smart and avoided the wicked witch." # print the story print(start) print(next1) print(next2) print (next3 print(ending)

2. Fix the errors so that it prints the first and last name only.

   # create the input input = "Pat,Smith,girl,65 Elm Street,eat' # split on the comma pieces = input.split(,) # print the values print("First name is:" + pieces) print("Last name is:" + pieces[2])

3. Fix the 6 syntax errors in the code below so that it runs. It will print a story.

   # create the input input = "Pat,Smith girl,65 Elm Street,eat" # split at the comma pieces = input.split(",) # initialize the variables first_name = pieces[0] last_name = pieces[1 gender = pieces[2] address = pieces[3] verb = pieces[4] # create the story start = "Once there was a " + gender + " named " + first_name + "." next1 = "A good " + gender + " living at " + address + "." next2 = "One day, a wicked witch came to the " last_name + " house." next3 = "The wicked witch was planning to " + verb + " " + first_name + "!" ending = "But " + first_name + " was smart and avoided the wicked witch." # print the story print(start) print next1 print(next2) print(next3) print(ending)

4. Complete the code on lines 8 - 12 to initialize the variables correctly according to the order of the input.

   # create the input input = "eat, Elm Street, girl, Pat, Smith" # split at the comma pieces = input.split(",") # initialize the variables first_name = last_name = gender = address = verb = # create the story start = "Once there was a " + gender + " named " + first_name + "." next1 = "A good " + gender + " living at " + address + "." next2 = "One day, a wicked witch came to the " + last_name + " house." next3 = "The wicked witch was planning to " + verb + " " + first_name + "!" ending = "But " + first_name + " was smart and avoided the wicked witch." # print the story print(start) print(next1) print(next2) print(next3) print(ending)

5. Indent 6 lines and fix the call to the procedure so that it works correctly. It will print a story.

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

6. The input is a list of strings, add code below it (and fix indentation and variable names if needed) so that the code will print a story for each string in the list.

   # create the input input = ["Pat,Smith,girl,65 Elm Street,eat", "John,Doe,Boy,25,123 Candy Lane, tickle"] # split at the comma pieces = input.split(",") # initialize the variables first_name = pieces[0] last_name = pieces[1] gender = pieces[2] address = pieces[3] verb = pieces[4] # create the story start = "Once there was a " + gender + " named " + first_name + "." next1 = "A good " + gender + " living at " + address + "." next2 = "One day, a wicked witch came to the " + last_name + " house." next3 = "The wicked witch was planning to " + verb + " " + first_name + "!" ending = "But " + first_name + " was smart and avoided the wicked witch." # print the story print(start) print(next1) print(next2) print(next3) print(ending)

7. Change 4 lines in the code below so that runs correctly without any errors. It will print a poem.

   input = "Roses,Violets,Sugar,Sue" pieces = input.split(",") flower1 = pieces[1] flower2 = pieces[2] spice = pieces[3] name = pieces[4] line1 = flower1 + " are red" line2 = flower2 + " are blue" line3 = spice + " is sweet" line4 = "And so it " + name print(line1) print(line2) print(line3) print(line4)

8. Fix the 6 errors so that the code prints the story properly.

   # create the input input = "Abe,Brown,boy,1313 Maple Lane,trick" # split at the comma pieces = input.split(,) # initialize the variables first_name = pieces[1] last_name = pieces[2] gender = pieces[3] address = pieces[5] verb = pieces[-1] # create the story start = "Once there was a " gender + " named " + first_name + "." next1 = "A good " + gender + " living at " + address + "." next2 = "One day, a wicked witch came to the " + last_name + " house." next3 = "The wicked witch was planning to " + verb + " " + first_name + "!" ending = "But " + first_name + " was smart and avoided the wicked witch." # print the story print("start") print(next1) print(next2) print(next3) print(ending)

9. Turn the following code into a function. It finds the name in a string and prints it. Pass in the string and return the name if it is found and “Unknown” if not. Be sure to call the function to test it. Test it both when the name is there and when it isn’t.

   name_part = "name: Anu Gao" pos_name = name_part.find("name:") if (pos_name > -1): name = name_part[pos_name+6:len(name_part)] else: name = "Unknown" print(name)

10. The procedure below takes a string and splits it to create a story. Change it so that it takes multiple strings, so it creates the story without having to use split.

    def witch_story (input): # split at the comma pieces = input.split(",") # initialize the variables first_name = pieces[0] last_name = pieces[1] gender = pieces[2] address = pieces[3] verb = pieces[4] # create the story start = "Once there was a " + gender + " named " + first_name + "." next1 = "A good " + gender + " living at " + address + "." next2 = "One day, a wicked witch came to the " + last_name + " house." next3 = "The wicked witch was planning to " + verb + " " + first_name + "!" ending = "But " + first_name + " was smart and avoided the wicked witch." # print the story print(start) print(next1) print(next2) print(next3) print(ending) # call the procedure witch_story("Abe,Brown,boy,1313 Maple Lane,trick")

11. Change the following code into a function that prints a crazy headline. It should take the values as parameters. Be sure to call the function to test it.

    input = "Elvis, alien, blue" pieces = input.split(",") name = pieces[0] thing = pieces[1] color = pieces[2] headline = name + " was abducted by a " + color + " " + thing + "." print(headline)

12. Fix the 3 errors to make the code print out the age.

    age_part = "Their age: 17" pos_age = age_part.find("age:") if (pos_age < 0): age = age_part[pos_age:len(age_part)] else: age = "Unknown" print(age)

13. Change the following into a procedure that prints the following story. Pass in the values that can change.

    input = "Jay,shoes" pieces = input.split(",") name = pieces[0] item = pieces[1] print("One day " + name + " went shopping.") print("He wanted to buy " + item + ".") print("But, he didn't like any.") print("So, " + name + " went home.")

14. Change the following into a procedure that takes one string in the format “name: Bob, age: 10”. The procedure should print the name and age.

    age_part = "Their age: 17" pos_age = age_part.find("age:") if (pos_age > -1): age = age_part[pos_age+5:len(age_part)] else: age = "Unknown" print(age) name_part = "name: Anu Gao" pos_name = name_part.find("name:") if (pos_name > -1): name = name_part[pos_name+6:len(name_part)] else: name = "Unknown" print(name)

15. Write a personalized story. It should start with a string of input and split that string to get the parts it needs for the story. For example, define a name, animal, animal name, and animal adjective and create a story from that.

16. Write a procedure that takes in a string with 2 adjectives, a noun, and a verb separated by a comma (ex: “crazy,blue,banana,runs”) in that order and prints a sentence using all 4 words.

17. Write a procedure that prints a personalized story. It should take as input the items that will allow you to personalize a story.

18. Write a procedure that takes in a name, age, and 2 verbs. If the age is less than 10, print a sentence using the name, age, and first verb. Otherwise print a sentence using the name, age, and second verb.

19. Write a procedure that prints a personalized story. It should take as input the items that will allow you to personalize a story. It should also take a gender and vary the story based on the gender.

20. Create a procedure that takes in a string like “name: Bob,age: 10,verb: dance” and prints out a sentence with just the name, age, and verb.