零基础学python函数全解之实例演示

1、import randomstudents = []def show_all():    print('***开始打印信息***')    for x in students:        print(x)    print('***打印信息结束***')

2、def insert_stu(name, age, grade, score=60):    students.append({'name': name, 'age': age, 'grade': grade, 'score': score})

3、def back_age_add():    res = 0    for x in students:        res += x['age']    return res

4、def sort_age(up=True):    for i in range(len(students)-1):        for j in range(i+1, len(students)):            if students[i]['age'] > students[j]['age']:                students[i], students[j] = students[j], students[i]    if not up:        students.reverse()

5、def after_year():    for x in students:        x['age'] += 1        x['grade'] += 1

6、def clear_score():    for x in students:        x['score'] = 0

7、names = ['hhl', 'ldh', 'zxy', 'cgx', 'xtf', 'cls', 'xcyz']for i in range(len(names)):    insert_stu(names[i], random.randrange(18, 29), i+1, random.randrange(50, 71))show_all()

8、print(back_age_add())

9、sort_age()show_all()

10、sort_age(False)show_all()