Chapter 17 Exercises¶

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

# initialize the variables firstName = "Pat' lastName = "Smith" gender = girl" address = "65 Elm Street verb = "eat" # 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)

Change the first ' to a " in line 2. Add a " before girl in line 4. Add a " at the end of line 5. Add a + before gender in line 9. Change firstname to firstName in line 13. Add a ) at the end of line 19.

# initialize the variables firstName = "Pat" lastName = "Smith" gender = "girl" address = "65 Elm Street" verb = "eat" # 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)

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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])

Fix the quotation mark in the second line. In the fifth line add quotations around the comma. Print pieces[0] and pieces[1].

# 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[0]) print("Last name is:" + pieces[1])

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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 firstName = pieces[0] lastName = pieces[1 gender = pieces[2] address = pieces[3] verb = pieces[4] # 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)

Add a comma before girl on line 2. Add a " before the ) on line 5. Add a ] at the end of line 9. Add a + in line 17. Add a ( and a ) on line 23.

# create the input input = "Pat,Smith,girl,65 Elm Street,eat" # split at the comma pieces = input.split(",") # initialize the variables firstName = pieces[0] lastName = pieces[1] gender = pieces[2] address = pieces[3] verb = pieces[4] # 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)

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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 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)

# create the input input = "eat, Elm Street, girl, Pat, Smith" # split at the comma pieces = input.split(",") # initialize the variables firstName = pieces[3] lastName = pieces[4] gender = pieces[2] address = pieces[1] verb = pieces[0] # 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)

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

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("boy", "Abe" "Brown", "1313 Maple Lane", "trick")

Indent lines 3-8. Add a , between the first name and the last name on the call on line 18. Move "boy" to after the last name in the call on line 18.

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")

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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 firstName = pieces[0] lastName = pieces[1] gender = pieces[2] address = pieces[3] verb = pieces[4] # 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)

Add a for loop, fix the indentation to put everything besides input in the body of the for loop, and change pieces to equal i.split(",") where i is each element in the string list.

# create the input input = ["Pat,Smith,girl,65 Elm Street,eat", "John,Doe,Boy,25,123 Candy Lane, tickle"] for i in input: # split at the comma pieces = i.split(",") # initialize the variables firstName = pieces[0] lastName = pieces[1] gender = pieces[2] address = pieces[3] verb = pieces[4] # 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)

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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)

Fix the indices on lines 3-6 as shown below.

input = "Roses,Violets,Sugar,Sue" pieces = input.split(",") flower1 = pieces[0] flower2 = pieces[1] spice = pieces[2] name = pieces[3] 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)

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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 firstName = pieces[1] lastName = pieces[2] gender = pieces[3] address = pieces[5] verb = pieces[-1] # 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)

On line 5, add quotations around the comma. On lines 8 - 11, fix the index positions. On line 15, add a plus sign before “gender”.

# create the input input = "Abe,Brown,boy,1313 Maple Lane,trick" # split at the comma pieces = input.split(",") # initialize the variables firstName = pieces[0] lastName = pieces[1] gender = pieces[2] address = pieces[3] verb = pieces[-1] # 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)

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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.

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

Define the function as shown below. Be sure to call the function to test it. Test it both when the name is there and when it isn’t.

def getName(namePart): posName = namePart.find("name:") if (posName > -1): name = namePart[posName+6:len(namePart)] else: name = "Unknown" return name print(getName("The name: Jasmine Brown")) print(getName("Jasmine Brown"))

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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 witchStory (input): # split at the comma pieces = input.split(",") # initialize the variables firstName = pieces[0] lastName = pieces[1] gender = pieces[2] address = pieces[3] verb = pieces[4] # 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")

Create 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")

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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)

Define a function that takes a list and then call the function and pass in the list. Print the result.

def getHeadline(name, thing, color): return name + " was abducted by a " + color + " " + thing + "." print(getHeadline("Elvis", "alien", "blue"))

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

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

In the if clause, check if the posAge > -1. In the body of the if clause, set the substring to be posAge + 6:len(agePart_).

agePart = "Their age: 17" posAge = agePart.find("age:") if (posAge > -1): age = agePart[posAge+5:len(agePart)] else: age = "Unknown" print(age)

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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.")

Define the procedure and call it. Be sure to pass the name and item.

def tellStory(name, item): print("One day " + name + " went shopping.") print("He wanted to buy " + item + ".") print("But, he didn't like any.") print("So, " + name + " went home.") tellStory("Blake", "pants")

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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.

agePart = "Their age: 17" posAge = agePart.find("age:") if (posAge > -1): age = agePart[posAge+5:len(agePart)] else: age = "Unknown" print(age) namePart = "name: Anu Gao" posName = namePart.find("name:") if (posName > -1): name = namePart[posName+6:len(namePart)] else: name = "Unknown" print(name)

Define procedure as shown below.

def aProcedure(aString): aList = aString.split(",") agePart = aList[1] namePart = aList[0] posAge = agePart.find("age:") if (posAge > -1): age = agePart[posAge+5:len(agePart)] else: age = "Unknown" posName = namePart.find("name:") if (posName > -1): name = namePart[posName+6:len(namePart)] else: name = "Unknown" print(name + "," + age) aProcedure("name: Bob,age: 10")

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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.

Here is one example. Look for a string with values separated with a comma. Look for use of the split function. Look for getting the values out of the list.

input = "Barb, horse, Sport, tall" pieces = input.split(",") name = pieces[0] animal = pieces[1] animalName = pieces[2] description = pieces[3] line1 = "Once upon a time there was a girl named, " + name + "." line2 = "She had a " + description + " " + animal + " named " + animalName + "." print(line1) print(line2)

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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.

Define a procedure similar to the one below.

def aProcedure(aString): pieces = aString.split(",") adj1 = pieces[0] adj2 = pieces[1] noun = pieces[2] verb = pieces[3] sentence = "The " + adj1 + " and " + adj2 + " " + noun + " " + verb + "." print(sentence) aProcedure("crazy,blue,banana,runs")

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

The example below is one possible procedure. Be sure to call it to test it.

def tellAnimalStory(name, animal, animalName, description): line1 = "Once upon a time there was a girl named, " + name + "." line2 = "She had a " + description + " " + animal + " named " + animalName + "." print(line1) print(line2) tellAnimalStory("Barb","horse","Sport","handsome")

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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.

Define a procedure similar to the one below.

def aSentence(name, age, verb1, verb2): if age < 10: print(name + " who is " + str(age) + " " + verb1) else: print(name + " who is " + str(age) + " " + verb1) aSentence("John", 10, "runs", "sleeps")

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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.

Here is one example. Look for a conditional with two options (if and else).

def tellAnimalStory(name, gender, animal, animalName, description): if (gender.find("female") > -1): line1 = "Once upon a time there was a girl named, " + name + "." line2 = "She had a " + description + " " + animal + " named " + animalName + "." else: line1 = "Once upon a time there was a boy name, " + name + "." line2 = "He had a " + description + " " + animal + " named " + animalName + "." print(line1) print(line2) tellAnimalStory("Barb", "female", "horse","Sport","handsome") tellAnimalStory("Mark", "male", "dog","Baxter","funny")

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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.

Define a procedure similar to below.

def aProcedure(aString): aList = aString.split(",") agePart = aList[1] namePart = aList[0] verbPart = aList[2] posName = namePart.find("name:") posAge = agePart.find("age:") posVerb = verbPart.find("verb:") if (posName > -1): name = namePart[posName+6:len(namePart)] else: name = "Unknown" if (posAge > -1): age = agePart[posAge+5:len(agePart)] else: age = "Unknown" if (posVerb > -1): verb = verbPart[posVerb+6:len(verbPart)] else: verb = "Unknown" print(name + " who is " + age + " likes to " + verb) aProcedure("name: Bob,age: 10,verb: dance")

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Chapter 17 Exercises¶