Codeacademy Python-06-Student Becomes the Teacher

06-Student Becomes the Teacher

在Codeacademy上学习Python课程，刷题的笔记记录如下，欢迎交流！

目录

Good Morning Class!

i. Lesson Number One 1/9

lloyd = {
    "name": "Lloyd",
    "homework": [],
    "quizzes": [],
    "tests": []
}
alice = {
    "name": "Alice",
    "homework": [],
    "quizzes": [],
    "tests": []
}
tyler = {
    "name": "Tyler",
    "homework": [],
    "quizzes": [],
    "tests": []
}

ii. What’s the Score? 2/9

lloyd = {
    "name": "Lloyd",
    "homework": [90.0, 97.0, 75.0, 92.0],
    "quizzes": [88.0, 40.0, 94.0],
    "tests": [75.0, 90.0]
}
alice = {
    "name": "Alice",
    "homework": [100.0, 92.0, 98.0, 100.0],
    "quizzes": [82.0, 83.0, 91.0],
    "tests": [89.0, 97.0]
}
tyler = {
    "name": "Tyler",
    "homework": [0.0, 87.0, 75.0, 22.0],
    "quizzes": [0.0, 75.0, 78.0],
    "tests": [100.0, 100.0]
}

iii. Put It Together 3/9

lloyd = {
    "name": "Lloyd",
    "homework": [90.0, 97.0, 75.0, 92.0],
    "quizzes": [88.0, 40.0, 94.0],
    "tests": [75.0, 90.0]
}
alice = {
    "name": "Alice",
    "homework": [100.0, 92.0, 98.0, 100.0],
    "quizzes": [82.0, 83.0, 91.0],
    "tests": [89.0, 97.0]
}
tyler = {
    "name": "Tyler",
    "homework": [0.0, 87.0, 75.0, 22.0],
    "quizzes": [0.0, 75.0, 78.0],
    "tests": [100.0, 100.0]
}
students = [lloyd, alice, tyler]

iv. For the Record 4/9

lloyd = {
    "name": "Lloyd",
    "homework": [90.0, 97.0, 75.0, 92.0],
    "quizzes": [88.0, 40.0, 94.0],
    "tests": [75.0, 90.0]
}
alice = {
    "name": "Alice",
    "homework": [100.0, 92.0, 98.0, 100.0],
    "quizzes": [82.0, 83.0, 91.0],
    "tests": [89.0, 97.0]
}
tyler = {
    "name": "Tyler",
    "homework": [0.0, 87.0, 75.0, 22.0],
    "quizzes": [0.0, 75.0, 78.0],
    "tests": [100.0, 100.0]
}
students = [lloyd, alice, tyler]
for x in students:
    print x['name']
    print x['homework']
    print x['quizzes']
    print x['tests']

Just Average

iv. It’s Okay to be Average 5/9

lloyd = {
    "name": "Lloyd",
    "homework": [90.0, 97.0, 75.0, 92.0],
    "quizzes": [88.0, 40.0, 94.0],
    "tests": [75.0, 90.0]
}
alice = {
    "name": "Alice",
    "homework": [100.0, 92.0, 98.0, 100.0],
    "quizzes": [82.0, 83.0, 91.0],
    "tests": [89.0, 97.0]
}
tyler = {
    "name": "Tyler",
    "homework": [0.0, 87.0, 75.0, 22.0],
    "quizzes": [0.0, 75.0, 78.0],
    "tests": [100.0, 100.0]
}

# Add your function below!
def average(numbers):
    total = sum (numbers)
    aver = float(total)/len(numbers)
    return aver

ii. Just Weight and See 6/9

lloyd = {
    "name": "Lloyd",
    "homework": [90.0, 97.0, 75.0, 92.0],
    "quizzes": [88.0, 40.0, 94.0],
    "tests": [75.0, 90.0]
}
alice = {
    "name": "Alice",
    "homework": [100.0, 92.0, 98.0, 100.0],
    "quizzes": [82.0, 83.0, 91.0],
    "tests": [89.0, 97.0]
}
tyler = {
    "name": "Tyler",
    "homework": [0.0, 87.0, 75.0, 22.0],
    "quizzes": [0.0, 75.0, 78.0],
    "tests": [100.0, 100.0]
}

# Add your function below!
def average(numbers):
    total = sum (numbers)
    aver = float(total)/len(numbers)
    return aver

def get_average(student):
    homework= average(student["homework"])
    quizzes =average(student["quizzes"])
    tests = average(student["tests"])
    return 0.1*homework + 0.3*quizzes + 0.6*tests 

iii. Sending a Letter 7/9

lloyd = {
    "name": "Lloyd",
    "homework": [90.0, 97.0, 75.0, 92.0],
    "quizzes": [88.0, 40.0, 94.0],
    "tests": [75.0, 90.0]
}
alice = {
    "name": "Alice",
    "homework": [100.0, 92.0, 98.0, 100.0],
    "quizzes": [82.0, 83.0, 91.0],
    "tests": [89.0, 97.0]
}
tyler = {
    "name": "Tyler",
    "homework": [0.0, 87.0, 75.0, 22.0],
    "quizzes": [0.0, 75.0, 78.0],
    "tests": [100.0, 100.0]
}

# Add your function below!
def average(numbers):
    total = sum (numbers)
    aver = float(total)/len(numbers)
    return aver

def get_average(student):
    homework= average(student["homework"])
    quizzes =average(student["quizzes"])
    tests = average(student["tests"])
    return 0.1*homework + 0.3*quizzes + 0.6*tests 

def get_letter_grade(score):
    if 90<=score:
        return "A"
    elif 80<=score<90:
        return "B"
    elif 70<=score<80:
        return "C"
    elif 60<=score<70:
        return "D"
    else:
        return "F"

get_average(lloyd)

iv. Part of the Whole 8/9

#列表如何作为函数的入口参数
lloyd = {
    "name": "Lloyd",
    "homework": [90.0, 97.0, 75.0, 92.0],
    "quizzes": [88.0, 40.0, 94.0],
    "tests": [75.0, 90.0]
}
alice = {
    "name": "Alice",
    "homework": [100.0, 92.0, 98.0, 100.0],
    "quizzes": [82.0, 83.0, 91.0],
    "tests": [89.0, 97.0]
}
tyler = {
    "name": "Tyler",
    "homework": [0.0, 87.0, 75.0, 22.0],
    "quizzes": [0.0, 75.0, 78.0],
    "tests": [100.0, 100.0]
}

# Add your function below!
def average(numbers):
    total = sum (numbers)
    aver = float(total)/len(numbers)
    return aver

def get_average(student):
    homework= average(student["homework"])
    quizzes =average(student["quizzes"])
    tests = average(student["tests"])
    return 0.1*homework + 0.3*quizzes + 0.6*tests 

def get_letter_grade(score):
    if 90<=score:
        return "A"
    elif 80<=score<90:
        return "B"
    elif 70<=score<80:
        return "C"
    elif 60<=score<70:
        return "D"
    else:
        return "F"       
    students=["lloyd","alice","tyler"]
def get_class_average(students):
    results=[]
    for student in students:    
        results.append(get_average(student))
    return average(results) 

v. How is Everybody Doing? 9/9

lloyd = {
    "name": "Lloyd",
    "homework": [90.0, 97.0, 75.0, 92.0],
    "quizzes": [88.0, 40.0, 94.0],
    "tests": [75.0, 90.0]
}
alice = {
    "name": "Alice",
    "homework": [100.0, 92.0, 98.0, 100.0],
    "quizzes": [82.0, 83.0, 91.0],
    "tests": [89.0, 97.0]
}
tyler = {
    "name": "Tyler",
    "homework": [0.0, 87.0, 75.0, 22.0],
    "quizzes": [0.0, 75.0, 78.0],
    "tests": [100.0, 100.0]
}

# Add your function below!
def average(numbers):
    total = sum (numbers)
    aver = float(total)/len(numbers)
    return aver

def get_average(student):
    homework= average(student["homework"])
    quizzes =average(student["quizzes"])
    tests = average(student["tests"])
    return 0.1*homework + 0.3*quizzes + 0.6*tests 

def get_letter_grade(score):
    if 90<=score:
        return "A"
    elif 80<=score<90:
        return "B"
    elif 70<=score<80:
        return "C"
    elif 60<=score<70:
        return "D"
    else:
        return "F"       

students=[lloyd,alice,tyler]
def get_class_average(students):
    results=[]
    for student in students:    
        results.append(get_average(student))
    return average(results)

print get_class_average(students)
print get_letter_grade(get_class_average(students))