[案例]实现学生信息库

3

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
# coding:utf-8

"""
    学生信息库
"""

students = {
    1: {
        'name': 'dewei',
        'age': 33,
        'class_number': 'A',
        'sex': 'boy'
    },
    2: {
        'name': '小慕',
        'age': 10,
        'class_number': 'B',
        'sex': 'boy'
    },
    3: {
        'name': '小曼',
        'age': 18,
        'class_number': 'A',
        'sex': 'girl'
    },
    4: {
        'name': '小高',
        'age': 18,
        'class_number': 'C',
        'sex': 'boy'
    },
    5: {
        'name': '小云',
        'age': 18,
        'class_number': 'B',
        'sex': 'girl'
    }
}


def check_user_info(**kwargs):
    if 'name' not in kwargs:
        return '没有发现学生姓名'
    if 'age' not in kwargs:
        return '没有发现学生姓名'
    if 'sex' not in kwargs:
        return '没有发现学生姓名'
    if 'class_number' not in kwargs:
        return '没有发现学生姓名'
    return True

def get_all_students():
    for id_, value in students.items():
        print('学号: {},姓名{},年龄{},性别{},班级{}'.format(
            id_, value['name'], value['age'], value['sex'], value['class_number']
        ))
    return students


# result = get_all_students()
# print('----', result)


def add_student(**kwargs):
    check = check_user_info(**kwargs)
    if check != True:
        print(check)
        return

    id_ = max(students) + 1

    students[id_] = {
        'name': kwargs['name'],
        'age': kwargs['age'],
        'sex': kwargs['sex'],
        'class_number': kwargs['class_number']
    }


# add_student(name='小白', age=19, class_number='A', sex='boy')
# get_all_students()


def delete_student(student_id):
    if student_id not in students:
        print('{}并不存在'.format(student_id))
    else:
        user_info = students.pop(student_id)
        print('学号是{}, {}同学的信息已经被删除了'.format(student_id, user_info['name']))


# delete_student(1)
# add_student(name='小白', age=19, class_number='A', sex='boy')
# get_all_students()

def update_student(student_id, **kwargs):
    if student_id not in students:
        print('并不存在这个学号:{}'.format(student_id))

    check = check_user_info(**kwargs)
    if check != True:
        print(check)
        return

    students[student_id] = kwargs
    print('同学信息更新完毕')


update_student(1, name='dewei.zhang', age=33, class_number='A', sex='boy')
get_all_students()


def get_user_by_id(student_id):
    return students.get(student_id)


print(get_user_by_id(3))


def search_users(**kwargs):
    values = list(students.values())
    key = None
    value = None
    result = []

    if 'name' in kwargs:
        key = 'name'
        value = kwargs[key]
    elif 'sex' in kwargs:
        key = 'sex'
        value = kwargs['sex']
    elif 'class_number' in kwargs:
        key = 'class_number'
        value = kwargs[key]
    elif 'age' in kwargs:
        key = 'age'
        value = kwargs[key]
    else:
        print('没有发现搜索的关键字')
        return

    for user in values:
        if user[key] == value:
            result.append(user)
    return result


print('---------')
# users = search_users(age=18)
users = search_users(sex='girl')
print(users)