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我们今天有两个目的,第一就是将之前面向函数开发的学生信息库功能转变为面向对象开发的学生信息库功能;第二就是要实现批量的增删改查及模糊查找的功能。
代码示例如下:
# coding:utf-8""" @Author:Neo @Date:2020/1/15 @Filename:students_info.py @Software:Pycharm"""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}, {}] 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 '缺少学生年龄' if 'sex' not in kwargs: return '缺少学生性别' if 'class_number' not in kwargs: return '缺少学生班级' return Truestudents = { 1: { 'name': 'Neo', 'age': 18, 'class_number': 'A', 'sex': 'boy' }, 2: { 'name': 'Jack', 'age': 16, 'class_number': 'B', 'sex': 'boy' }, 3: { 'name': 'Lily', 'age': 18, 'class_number': 'A', 'sex': 'girl' }, 4: { 'name': 'Adem', 'age': 18, 'class_number': 'C', 'sex': 'boy' }, 5: { 'name': 'HanMeiMei', 'age': 18, 'class_number': 'B', 'sex': 'girl' }}if __name__ == '__main__': student_info = StudentInfo(students) user = student_info.get_by_id(1) student_info.add(name='Marry', age=16, class_number='A', sex='girl') users = [ {'name': 'Atom', 'age': 17, 'class_number': 'B', 'sex': 'boy'}, {'name': 'Lucy', 'age': 18, 'class_number': 'C', 'sex': 'girl'} ] student_info.adds(users) student_info.get_all_students() print('------------------------------------------------------') # >>> 执行结果如下:# >>> 学号:1, 姓名:Neo, 年龄:18, 性别:boy, 班级:A# >>> 学号:2, 姓名:Jack, 年龄:16, 性别:boy, 班级:B# >>> 学号:3, 姓名:Lily, 年龄:18, 性别:girl, 班级:A# >>> 学号:4, 姓名:Adem, 年龄:18, 性别:boy, 班级:C# >>> 学号:5, 姓名:HanMeiMei, 年龄:18, 性别:girl, 班级:B# >>> 学号:6, 姓名:Marry, 年龄:16, 性别:girl, 班级:A# >>> 学号:7, 姓名:Atom, 年龄:17, 性别:boy, 班级:B# >>> 学号:8, 姓名:Lucy, 年龄:18, 性别:girl, 班级:C# >>> ------------------------------------------------------ student_info.deletes([7, 8]) student_info.get_all_students() print('------------------------------------------------------')# >>> 执行结果如下:# >>> ------------------------------------------------------# >>> 学号7 学生Atom 已被移除# >>> 学号8 学生Lucy 已被移除# >>> 学号:1, 姓名:Neo, 年龄:18, 性别:boy, 班级:A# >>> 学号:2, 姓名:Jack, 年龄:16, 性别:boy, 班级:B# >>> 学号:3, 姓名:Lily, 年龄:18, 性别:girl, 班级:A# >>> 学号:4, 姓名:Adem, 年龄:18, 性别:boy, 班级:C# >>> 学号:5, 姓名:HanMeiMei, 年龄:18, 性别:girl, 班级:B# >>> 学号:6, 姓名:Marry, 年龄:16, 性别:girl, 班级:A# >>> ------------------------------------------------------ student_info.updates([ {1: {'name': 'Jone', 'age': 18, 'class_number': 'A', 'sex': 'boy'}}, {2: {'name': 'Nike', 'age': 18, 'class_number': 'A', 'sex': 'boy'}} ]) student_info.get_all_students() print('------------------------------------------------------') # >>> 执行结果如下:# >>> ------------------------------------------------------# >>> 所有用户信息更新完成# >>> 学号:1, 姓名:Jone, 年龄:18, 性别:boy, 班级:A# >>> 学号:2, 姓名:Nike, 年龄:18, 性别:boy, 班级:A# >>> 学号:3, 姓名:Lily, 年龄:18, 性别:girl, 班级:A# >>> 学号:4, 姓名:Adem, 年龄:18, 性别:boy, 班级:C# >>> 学号:5, 姓名:HanMeiMei, 年龄:18, 性别:girl, 班级:B# >>> 学号:6, 姓名:Marry, 年龄:16, 性别:girl, 班级:A# >>> ------------------------------------------------------ result = student_info.search_users(name='d') print(result) print('------------------------------------------------------') # >>> 执行结果如下:# >>> [{'name': 'Adem', 'age': 18, 'class_number': 'C', 'sex': 'boy'}] result = student_info.search_users(name='小') print(result) print('------------------------------------------------------')# >>> 执行结果如下:# >>> ------------------------------------------------------# >>> []# >>> ------------------------------------------------------ result = student_info.search_users(name='') print(result) result = student_info.search_users(name='小') print(result) print('------------------------------------------------------')# >>> 执行结果如下:# >>> ------------------------------------------------------[{'name': 'Jone', 'age': 18, 'class_number': 'A', 'sex': 'boy'}, {'name': 'Nike', 'age': 18, 'class_number': 'A', 'sex': 'boy'}, {'name': 'Lily', 'age': 18, 'class_number': 'A', 'sex': 'girl'}, {'name': 'Adem', 'age': 18, 'class_number': 'C', 'sex': 'boy'}, {'name': 'HanMeiMei', 'age': 18, 'class_number': 'B', 'sex': 'girl'}, {'name': 'Marry', 'age': 16, 'class_number': 'A', 'sex': 'girl'}]# >>> [] result = student_info.search_users(name='') print(result)
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