students = ['bernice', 'aaron', 'cody']

for student in students:
    print("Hello, " + student.title() + "!")

dogs = ['border collie', 'australian cattle dog', 'labrador retriever']

dogs = ['border collie', 'australian cattle dog', 'labrador retriever']

dog = dogs[0]
print(dog.title())

###highlight=[4]
dogs = ['border collie', 'australian cattle dog', 'labrador retriever']

dog = dogs[1]
print(dog.title())

###highlight=[4]
dogs = ['border collie', 'australian cattle dog', 'labrador retriever']

dog = dogs[-1]
print(dog.title())

###highlight=[4]
dogs = ['border collie', 'australian cattle dog', 'labrador retriever']

dog = dogs[-2]
print(dog.title())

###highlight=[4]
dogs = ['border collie', 'australian cattle dog', 'labrador retriever']

dog = dogs[-4]
print(dog.title())

dogs = ['border collie', 'australian cattle dog', 'labrador retriever']

for dog in dogs:
    print(dog)

###highlight=[5]
dogs = ['border collie', 'australian cattle dog', 'labrador retriever']

for dog in dogs:
    print('I like ' + dog + 's.')

###highlight=[6,7,8]
dogs = ['border collie', 'australian cattle dog', 'labrador retriever']

for dog in dogs:
    print('I like ' + dog + 's.')
    print('No, I really really like ' + dog +'s!\n')
    
print("\nThat's just how I feel about dogs.")

dogs = ['border collie', 'australian cattle dog', 'labrador retriever']

print("Results for the dog show are as follows:\n")
for index, dog in enumerate(dogs):
    place = str(index)
    print("Place: " + place + " Dog: " + dog.title())

###highlight=[6]
dogs = ['border collie', 'australian cattle dog', 'labrador retriever']

print("Results for the dog show are as follows:\n")
for index, dog in enumerate(dogs):
    place = str(index + 1)
    print("Place: " + place + " Dog: " + dog.title())

###highlight=[5]
dogs = ['border collie', 'australian cattle dog', 'labrador retriever']

for dog in dogs:
    print(dogs)

###highlight=[5]
dogs = ['border collie', 'australian cattle dog', 'labrador retriever']

for dog in dogs:
    print('I like ' + dogs + 's.')

dogs = ['border collie', 'australian cattle dog', 'labrador retriever']

dogs[0] = 'australian shepherd'
print(dogs)

dogs = ['border collie', 'australian cattle dog', 'labrador retriever']

print(dogs.index('australian cattle dog'))

###highlight=[4]
dogs = ['border collie', 'australian cattle dog', 'labrador retriever']

print(dogs.index('poodle'))

dogs = ['border collie', 'australian cattle dog', 'labrador retriever']

print('australian cattle dog' in dogs)
print('poodle' in dogs)

dogs = ['border collie', 'australian cattle dog', 'labrador retriever']
dogs.append('poodle')

for dog in dogs:
    print(dog.title() + "s are cool.")

dogs = ['border collie', 'australian cattle dog', 'labrador retriever']
dogs.insert(1, 'poodle')

print(dogs)

# Create an empty list to hold our users.
usernames = []

# Add some users.
usernames.append('bernice')
usernames.append('cody')
usernames.append('aaron')

# Greet all of our users.
for username in usernames:
    print("Welcome, " + username.title() + '!')

###highlight=[10,11,12]
# Create an empty list to hold our users.
usernames = []

# Add some users.
usernames.append('bernice')
usernames.append('cody')
usernames.append('aaron')

# Greet all of our users.
for username in usernames:
    print("Welcome, " + username.title() + '!')

# Recognize our first user, and welcome our newest user.
print("\nThank you for being our very first user, " + usernames[0].title() + '!')
print("And a warm welcome to our newest user, " + usernames[-1].title() + '!')

students = ['bernice', 'aaron', 'cody']

# Put students in alphabetical order.
students.sort()

# Display the list in its current order.
print("Our students are currently in alphabetical order.")
for student in students:
    print(student.title())

#Put students in reverse alphabetical order.
students.sort(reverse=True)

# Display the list in its current order.
print("\nOur students are now in reverse alphabetical order.")
for student in students:
    print(student.title())

students = ['bernice', 'aaron', 'cody']

# Display students in alphabetical order, but keep the original order.
print("Here is the list in alphabetical order:")
for student in sorted(students):
    print(student.title())

# Display students in reverse alphabetical order, but keep the original order.
print("\nHere is the list in reverse alphabetical order:")
for student in sorted(students, reverse=True):
    print(student.title())

print("\nHere is the list in its original order:")
# Show that the list is still in its original order.
for student in students:
    print(student.title())

students = ['bernice', 'aaron', 'cody']
students.reverse()

print(students)

numbers = [1, 3, 4, 2]

# sort() puts numbers in increasing order.
numbers.sort()
print(numbers)

# sort(reverse=True) puts numbers in decreasing order.
numbers.sort(reverse=True)
print(numbers)


numbers = [1, 3, 4, 2]

# sorted() preserves the original order of the list:
print(sorted(numbers))
print(numbers)

numbers = [1, 3, 4, 2]

# The reverse() function also works for numerical lists.
numbers.reverse()
print(numbers)

usernames = ['bernice', 'cody', 'aaron']
user_count = len(usernames)

print(user_count)

# Create an empty list to hold our users.
usernames = []

# Add some users, and report on how many users we have.
usernames.append('bernice')
user_count = len(usernames)

print("We have " + str(user_count) + " user!")

usernames.append('cody')
usernames.append('aaron')
user_count = len(usernames)

print("We have " + str(user_count) + " users!")

usernames = ['bernice', 'cody', 'aaron']
user_count = len(usernames)

print("This will cause an error: " + user_count)

###highlight=[5]
usernames = ['bernice', 'cody', 'aaron']
user_count = len(usernames)

print("This will work: " + str(user_count))

dogs = ['border collie', 'australian cattle dog', 'labrador retriever']
# Remove the first dog from the list.
del dogs[0]

print(dogs)

dogs = ['border collie', 'australian cattle dog', 'labrador retriever']
# Remove australian cattle dog from the list.
dogs.remove('australian cattle dog')

print(dogs)

letters = ['a', 'b', 'c', 'a', 'b', 'c']
# Remove the letter a from the list.
letters.remove('a')

print(letters)

dogs = ['border collie', 'australian cattle dog', 'labrador retriever']
last_dog = dogs.pop()

print(last_dog)
print(dogs)

###highlight=[3]
dogs = ['border collie', 'australian cattle dog', 'labrador retriever']
first_dog = dogs.pop(0)

print(first_dog)
print(dogs)

usernames = ['bernice', 'cody', 'aaron', 'ever', 'dalia']

# Grab the first three users in the list.
first_batch = usernames[0:3]

for user in first_batch:
    print(user.title())

###highlight=[5]
usernames = ['bernice', 'cody', 'aaron', 'ever', 'dalia']

# Grab the first three users in the list.
first_batch = usernames[:3]

for user in first_batch:
    print(user.title())

###highlight=[7,8,9]
usernames = ['bernice', 'cody', 'aaron', 'ever', 'dalia']

# Grab the first three users in the list.
first_batch = usernames[0:3]

# The original list is unaffected.
for user in usernames:
    print(user.title())

usernames = ['bernice', 'cody', 'aaron', 'ever', 'dalia']

# Grab a batch from the middle of the list.
middle_batch = usernames[1:4]

for user in middle_batch:
    print(user.title())

usernames = ['bernice', 'cody', 'aaron', 'ever', 'dalia']

# Grab all users from the third to the end.
end_batch = usernames[2:]

for user in end_batch:
    print(user.title())

usernames = ['bernice', 'cody', 'aaron', 'ever', 'dalia']

# Make a copy of the list.
copied_usernames = usernames[:]
print("The full copied list:\n\t", copied_usernames)

# Remove the first two users from the copied list.
del copied_usernames[0]
del copied_usernames[0]
print("\nTwo users removed from copied list:\n\t", copied_usernames)

# The original list is unaffected.
print("\nThe original list:\n\t", usernames)

# Print out the first ten numbers.
numbers = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10]

for number in numbers:
    print(number)

# Print the first ten numbers.
for number in range(1,11):
    print(number)

# Print the first ten odd numbers.
for number in range(1,21,2):
    print(number)

# Create a list of the first ten numbers.
numbers = list(range(1,11))
print(numbers)

# Store the first million numbers in a list.
numbers = list(range(1,1000001))

# Show the length of the list:
print("The list 'numbers' has " + str(len(numbers)) + " numbers in it.")

# Show the last ten numbers:
print("\nThe last ten numbers in the list are:")
for number in numbers[-10:]:
    print(number)

ages = [23, 16, 14, 28, 19, 11, 38]

youngest = min(ages)
oldest = max(ages)
total_years = sum(ages)

print("Our youngest reader is " + str(youngest) + " years old.")
print("Our oldest reader is " + str(oldest) + " years old.")
print("Together, we have " + str(total_years) + " years worth of life experience.")

# Store the first ten square numbers in a list.
# Make an empty list that will hold our square numbers.
squares = []

# Go through the first ten numbers, square them, and add them to our list.
for number in range(1,11):
    new_square = number**2
    squares.append(new_square)
    
# Show that our list is correct.
for square in squares:
    print(square)

###highlight=[8]
# Store the first ten square numbers in a list.
# Make an empty list that will hold our square numbers.
squares = []

# Go through the first ten numbers, square them, and add them to our list.
for number in range(1,11):
    squares.append(number**2)
    
# Show that our list is correct.
for square in squares:
    print(square)

###highlight=[2,3]
# Store the first ten square numbers in a list.
squares = [number**2 for number in range(1,11)]

# Show that our list is correct.
for square in squares:
    print(square)

# Make an empty list that will hold the even numbers.
evens = []

# Loop through the numbers 1-10, double each one, and add it to our list.
for number in range(1,11):
    evens.append(number*2)
    
# Show that our list is correct:
for even in evens:
    print(even)

###highlight=[2,3]
# Make a list of the first ten even numbers.
evens = [number*2 for number in range(1,11)]

for even in evens:
    print(even)

# Consider some students.
students = ['bernice', 'aaron', 'cody']

# Let's turn them into great students.
great_students = []
for student in students:
    great_students.append(student.title() + " the great!")

# Let's greet each great student.
for great_student in great_students:
    print("Hello, " + great_student)

###highlight=[5,6]
# Consider some students.
students = ['bernice', 'aaron', 'cody']

# Let's turn them into great students.
great_students = [student.title() + " the great!" for student in students]

# Let's greet each great student.
for great_student in great_students:
    print("Hello, " + great_student)

message = "Hello!"

for letter in message:
    print(letter)

message = "Hello world!"

message_list = list(message)
print(message_list)

message = "Hello World!"
first_char = message[0]
last_char = message[-1]

print(first_char, last_char)

message = "Hello World!"
first_three = message[:3]
last_three = message[-3:]

print(first_three, last_three)

message = "I like cats and dogs."
dog_present = 'dog' in message
print(dog_present)

message = "I like cats and dogs."
dog_index = message.find('dog')
print(dog_index)

###highlight=[2]
message = "I like cats and dogs, but I'd much rather own a dog."
dog_index = message.find('dog')
print(dog_index)

###highlight=[3,4]
message = "I like cats and dogs, but I'd much rather own a dog."
last_dog_index = message.rfind('dog')
print(last_dog_index)

message = "I like cats and dogs, but I'd much rather own a dog."
message = message.replace('dog', 'snake')
print(message)

message = "I like cats and dogs, but I'd much rather own a dog."
number_dogs = message.count('dog')
print(number_dogs)

message = "I like cats and dogs, but I'd much rather own a dog."
words = message.split(' ')
print(words)

animals = "dog, cat, tiger, mouse, liger, bear"

# Rewrite the string as a list, and store it in the same variable
animals = animals.split(',')
print(animals)

colors = ('red', 'green', 'blue')
print("The first color is: " + colors[0])

print("\nThe available colors are:")
for color in colors:
    print("- " + color)

colors = ('red', 'green', 'blue')
colors.append('purple')

animal = 'dog'
print("I have a " + animal + ".")

animals = ['dog', 'cat', 'bear']
for animal in animals:
    print("I have a " + animal + ".")

animal = 'dog'
print("I have a %s." % animal)

animals = ['dog', 'cat', 'bear']
for animal in animals:
    print("I have a %s." % animal)

animals = ['dog', 'cat', 'bear']
print("I have a %s, a %s, and a %s." % (animals[0], animals[1], animals[2]))

number = 23
print("My favorite number is " + number + ".")

###highlight=[3]
number = 23
print("My favorite number is " + str(number) + ".")

###highlight=[3]
number = 23
print("My favorite number is %d." % number)

numbers = [7, 23, 42]
print("My favorite numbers are %d, %d, and %d." % (numbers[0], numbers[1], numbers[2]))

###highlight=[3]
numbers = [7, 23, 42]
print("My favorite numbers are " + str(numbers[0]) + ", " + str(numbers[1]) + ", and " + str(numbers[2]) + ".")

names = ['eric', 'ever']
numbers = [23, 2]
print("%s's favorite number is %d, and %s's favorite number is %d." % (names[0].title(), numbers[0], names[1].title(), numbers[1]))