Python 入门教程 10 ---- Student Becomes the Teacher
第一节
1 练习
1 设置三个的字典分别为lloyd，alice，tyler
2 对每一个的字典的key都设置为"name"，"homework" , "quizzes", "tests"
3 每个字典的key为"name"对应的为人的名字，其他key对应的值为空列表
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 liststudents = [lloyd , alice , tyler]# Add your function below!def average(lst): sum = 0 for num in lst: sum = sum+num return float(sum)/len(lst)# function get_averagedef get_average(stu): return 0.1*average(stu["homework"])+0.3*average(stu["quizzes"])+0.6*average(stu["tests"])# function get_letter_gradedef get_letter_grade(score): if(score >= 90): return "A" elif(score >= 80 and score < 90): return "B" elif(score >= 70 and score < 80): return "C" elif(score >= 60 and score < 70): return "D" else: return "F"# function get_class_averagedef get_class_average(class_list): sum = 0 for stu in class_list: sum = sum + get_average(stu) return float(sum)/len(class_list)# print you resultscore = get_class_average(students)print scoreprint get_letter_grade(score