Python學習(三)

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]
}

# 計算平均成績
def average(numbers):
    total=sum(numbers)
    total=float(total)/len(numbers)
    return total
    
#a function called get_average that takes a student dictionary (like lloyd, alice, or tyler) as input and returns his/her weighted average.
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
    
# get_letter_grade function that takes a number score as input and returns a string with the letter grade that that student should receive.
def get_letter_grade(score):
    if score>=90:
        return "A"
    elif score >=80:
        return "B"
    elif score >=70:
        return "C"
    elif score>=60:
        return "D"
    else:
        return "F"

print get_letter_grade(lloyd)

#get the average for each student and then calculate the average of those averages.
def get_class_average(students):
    results=[]
    for student in students:
        results.append(get_average(student))
    return average(results)
        
students=[lloyd,alice,tyler]
print get_class_average(students)
print get_letter_grade(get_class_average(students))//高階函數調用方式

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