使用一个变量all_students保存一个班的学生信息(4个),每个学生需要保存:姓名、年龄、成绩、电话
all_students = [
{'name':'stu1', 'age': 19, 'score':81, 'tel':'192222'},
{'name':'stu2', 'age': 29, 'score':90, 'tel':'211222'},
{'name':'stu3', 'age': 12, 'score':67, 'tel':'521114'},
{'name':'stu4', 'age': 30, 'score':45, 'tel':'900012'},
]
1.添加学生:输入学生信息,将输入的学生的信息保存到all_students中
例如输入:
姓名: 小明
年龄: 20
成绩: 100
电话: 111922
那么就在all_students中添加{'name':'小明', 'age': 20, 'score': 100, 'tel':'111922'}
代码:
name = input("姓名:")
age = input("年龄:")
score = input("成绩:")
phone = input("电话:")
student = {
'name':name,
'age':int(age),
'score':int(score),
'phone':phone
}
all_students.append(student)
print(all_students)
2.按姓名查看学生信息:
例如输入:
姓名: stu1 就打印:'name':'stu1', 'age': 19, 'score':81, 'tel':'192222'
代码:
name = input("姓名:")
for student in all_students:
if student["name"]==name:
print(student)
3.求所有学生的平均成绩和平均年龄
sum_ages = 0
sum_scores = 0
for student in all_students:
sum_ages += student["age"]
sum_score += student["score"]
print("所有学生的平均成绩为:%f,平均年龄为:%f" % (sum_scores / len(all_students),sum_ages / len(all_students)))
4.删除班级中年龄小于18岁的学生
for student in all_students[:]:
if student["age"]<18:
all_students.remove(student)
print(all_students)
5.统计班级中不及格的学生的人数
count = 0
for student in all_students:
if student["score"]<60:
count += 1
print("班级中不及格的学生人数为:",count)
6.打印手机号最后一位是2的学生的姓名
for student in all_students:
# 获取手机号列表
phone = student["phone"]
if phone[-1]=='2':
print("该学生姓名为:%s,他的手机号为:%s" % (student["name"],student["tel"]))
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