python_学生信息管理实例

  1 class Student:
  2     def __init__(self,No,name,sex,age):
  3         self.No = No
  4         self.name = name
  5         self.sex = sex
  6         self.age = age
  7 
  8     def show(self):
  9         print("%s %s %s %d"%(self.No,self.name,self.sex,self.age))
 10 
 11 class StudentList:
 12     def __init__(self):
 13         self.students=[]   #存信息的空list
 14 
 15     def show(self):
 16         print("%s %s %s %d" % (No,name,sex,age))
 17         for s in self.students:
 18             s.show()
 19 
 20     def __insert(self,s):
 21         i = 0
 22         while (i<len(self.students) and s.No> self.students[i].No):  ##!!
 23             i=i+1
 24         if (i<len(self.students) and s.No== self.students[i].NO):  ##!!
 25             print(s.No+"已经存在")
 26             return False
 27         self.students.insert(i,s)
 28         print("添加成功")
 29         return True
 30 
 31     def __update(self,s):
 32         flag = False
 33         for i in range(len(self.studenlist)):
 34             if(s.No == self.students[i].No):
 35                 self.students[i].name = s.name
 36                 self.students[i].sex = s.sex
 37                 self.students[i].age = s.age
 38                 print("修改成功")
 39                 flag = True
 40                 break
 41         if (not flag):
 42             print("没有这个学生")
 43         return flag
 44 
 45     def __delete(self,No):
 46         flag = False
 47         for i in range(len(self.students)):
 48             if (self.students[i].No == No):
 49                 del self.students[i]
 50                 print("删除成功")
 51                 flag = True
 52                 break
 53         if(not flag):
 54             print("没有这个学生")
 55         return flag
 56 
 57     #用户预输入数据
 58     def insert(self):
 59         No = input("NO:")
 60         name = input("Name:")
 61         while True:
 62             sex = input("Sex:")
 63             if(sex=='男' or sex=='女'):
 64                 break
 65             else:
 66                 print("----Sex数据有误----")
 67         age = int(input("Age:"))
 68         if(No!='' or name!=''):
 69             self.__insert(Student(No,name,sex,age))
 70         else:
 71             print("----学号or性别不能为空----")
 72 
 73     def update(self):
 74         No = input("NO:")
 75         name = input("Name:")
 76         while True:
 77             sex = input("Sex:")
 78             if (sex == '男' or sex == '女'):
 79                 break
 80             else:
 81                 print("----Sex数据有误----")
 82         age = int(input("Age:"))
 83         if (No != '' or name != ''):
 84             self.__update(Student(NO, name, sex, age))
 85         else:
 86             print("----学号or性别不能为空 ----")
 87 
 88     def delete(self):
 89         No = input("No:")
 90         if(No != ''):
 91             self.__delete(No)
 92     #用户输入
 93     def scanf(self):
 94         while True:
 95             s=input(">>>")
 96             if (s =='insert'):
 97                 self.insert()
 98             elif (s =='update'):
 99                 self.update()
100             elif (s =='delete'):
101                 self.delete()
102             elif (s =='show'):
103                 self.show()
104             elif (s =='exit'):
105                 break
106             else:
107                 print("----指令输入错误----")
108 
109 s=StudentList()
110 s.scanf()