20201224-3

1-1
# formatted_name

def get_formatted_name(first_name, last_name, middle_name=''):
    """Return a full name, neatly formatted."""
    if middle_name:
        full_name = first_name + ' ' +  middle_name + ' ' + last_name
    else:
        full_name = first_name + ' ' + last_name
    return full_name.title()
    
musician = get_formatted_name('jimi', 'hendrix')
print(musician)

musician = get_formatted_name('john', 'hooker', 'lee')
print(musician)

1-2
# person

def build_person(first_name, last_name, age=''):
    """Return a dictionary of information about a person."""
    person = {'first': first_name, 'last': last_name}
    if age:
        person['age'] = age
    return person

musician = build_person('jimi', 'hendrix', age=27)
print(musician)

2-1
# greet_users

def greet_users(names):
    """Print a simple greeting to each user in the list."""
    for name in names:
        msg = "Hello, " + name.title() + "!"
        print(msg)

usernames = ['hannah', 'ty', 'margot']
greet_users(usernames)

2-2
# greeter

def greet_user(username):
    """Display a simple greeting."""
    print("Hello, " + username.title() + "!")
    
greet_user('jesse')

2-3

# printing models

def print_models(unprinted_designs, completed_models):
    """
    Simulate printing each design, until there are none left.
    Move each design to completed_models after printing.
    """
    while unprinted_designs:
        current_design = unprinted_designs.pop()
    
        # Simulate creating a 3d print from the design.
        print("Printing model: " + current_design)
        completed_models.append(current_design)
        
def show_completed_models(completed_models):
    """Show all the models that were printed."""
    print("
The following models have been printed:")
    for completed_model in completed_models:
        print(completed_model)
        
        
unprinted_designs = ['iphone case', 'robot pendant', 'dodecahedron']
completed_models = []

print_models(unprinted_designs, completed_models)
show_completed_models(completed_models)

3-1
# pets

def describe_pet(pet_name, animal_type='dog'):
    """Display information about a pet."""
    print("
I have a " + animal_type + ".")
    print("My " + animal_type + "'s name is " + pet_name.title() + ".")
    
# A dog named Willie.
describe_pet('willie')
describe_pet(pet_name='willie')

# A hamster named Harry.
describe_pet('harry', 'hamster')
describe_pet(pet_name='harry', animal_type='hamster')
describe_pet(animal_type='hamster', pet_name='harry')

--->
I have a dog.
My dog's name is Willie.

I have a dog.
My dog's name is Willie.

I have a hamster.
My hamster's name is Harry.

I have a hamster.
My hamster's name is Harry.

I have a hamster.
My hamster's name is Harry.

4-1
# pizza

def make_pizza(size, *toppings):
    """Summarize the pizza we are about to make."""
    print("
Making a " + str(size) +
          "-inch pizza with the following toppings:")
    for topping in toppings:
        print("- " + topping)
        
make_pizza(16, 'pepperoni')
make_pizza(12, 'mushrooms', 'green peppers', 'extra cheese')

--->
Making a 16-inch pizza with the following toppings:
- pepperoni

Making a 12-inch pizza with the following toppings:
- mushrooms
- green peppers
- extra cheese

注：知识点链接
https://www.cnblogs.com/azxsdcv/p/13964190.html

5-1
# user_profile

def build_profile(first, last, **user_info):
    """Build a dictionary containing everything we know about a user."""
    profile = {}
    profile['first_name'] = first
    profile['last_name'] = last
    for key, value in user_info.items():
        profile[key] = value
    return profile

user_profile = build_profile('albert', 'einstein',
                             location='princeton',
                             field='physics')
print(user_profile)
--->
{'first_name': 'albert', 'last_name': 'einstein', 'location': 'princeton', 'field': 'physics'}

注：知识点链接
https://www.cnblogs.com/azxsdcv/p/13964190.html