学生信息库的优化

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
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
# coding:utf-8

"""
    学生信息库
"""

class StudentInfo(object):
    def __init__(self, students):
        self.students = students

    def get_by_id(self, student_id):
        return self.students.get(student_id)

    def get_all_students(self):
        for id_, value in self.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 self.students

    def add(self, **student):
        check = self.check_user_info(**student)
        if check != True:
            print(check)
            return
        self.__add(**student)

    def adds(self, new_students):
        for student in new_students:
            check = self.check_user_info(**student)
            if check != True:
                print(check, student.get('name'))
                continue
            self.__add(**student)

    def __add(self, **student):
        new_id = max(self.students) + 1
        self.students[new_id] = student

    def delete(self, student_id):
        if student_id not in self.students:
            print('{}并不存在'.format(student_id))
        else:
            user_info = self.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']))

    def deletes(self, ids):
        for id_ in ids:
            if id_ not in self.students:
                print(f'{id_}不存在学生库中')
                continue
            student_info = self.students.pop(id_)
            print(f'学号{id_} 学生{student_info["name"]} 已被移除')

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

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

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

    def updates(self, update_students):
        for student in update_students:
            id_ = list(student.keys())[0]
            if id_ not in self.students:
                print(f'学号{id_}不存在')
                continue
            user_info = student[id_]
            check = self.check_user_info(**user_info)
            if check != True:
                print(check)
                continue
            self.students[id_] = user_info
        print('所有用户信息更新完成')

    def search_users(self, **kwargs):
        values = list(self.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:  # [{name, sex, age, class_number}, {}]
            # print(user[key])
            # print(value)
            if value in user[key]:
                result.append(user)
        return result

    def check_user_info(self, **kwargs):
        if 'name' not in kwargs:
            return '没有发现学生姓名'
        if 'age' not in kwargs:
            return '没有发现学生年龄'
        if 'sex' not in kwargs:
            return '没有发现学生性别'
        if 'class_number' not in kwargs:
            return '没有发现学生班级'
        return True



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'
    }
}

if __name__ == '__main__':
    students_info = StudentInfo(students)
    user = students_info.get_by_id(1)
    students_info.add(name='dewei', age=34, class_number='A', sex='boy')
    # print(students_info.students)
    users = [
        {'name': 'xiaoming', 'age': 17, 'class_number': 'b', 'sex': 'boy'},
        {'name': 'xiaohong', 'age': 18, 'class_number': 'c', 'sex': 'girl'}
    ]
    students_info.adds(users)
    students_info.get_all_students()
    print('-----------------')
    students_info.deletes([7, 8])
    students_info.get_all_students()
    print('-------------')
    students_info.updates([
        {1: {'name': 'dewei.zhang', 'age': 18, 'class_number': 'A', 'sex': 'boy'}},
        {2: {'name': '小慕同学', 'age': 18, 'class_number': 'A', 'sex': 'boy'}}
    ])
    students_info.get_all_students()
    result = students_info.search_users(name='d')
    print(result)
    result = students_info.search_users(name='小')
    print(result)
    # 如果同学想用年龄字段模糊查询,
    # 需要把年龄改为str类型
    print('---------------')
    result = students_info.search_users(name='')
    print(result)