python_学生信息管理实例

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"""提示：代码中的内容均被注释，请参考，切勿照搬"""

"""注意:代码切勿照搬，错误请留言指出"""

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 class Student:
     def __init__(self,No,name,sex,age):
         self.No = No
         self.name = name
         self.sex = sex
         self.age = age

     def show(self):
         print("%s %s %s %d"%(self.No,self.name,self.sex,self.age))

 class StudentList:
     def __init__(self):
         self.students=[]   #存信息的空list

     def show(self):
         print("%s %s %s %d" % (No,name,sex,age))
         for s in self.students:
             s.show()

     def __insert(self,s):
         i = 0
         while (i<len(self.students) and s.No> self.students[i].No):  ##!!
             i=i+1
         if (i<len(self.students) and s.No== self.students[i].NO):  ##!!
             print(s.No+"已经存在")
             return False
         self.students.insert(i,s)
         print("添加成功")
         return True

     def __update(self,s):
         flag = False
         for i in range(len(self.studenlist)):
             if(s.No == self.students[i].No):
                 self.students[i].name = s.name
                 self.students[i].sex = s.sex
                 self.students[i].age = s.age
                 print("修改成功")
                 flag = True
                 break
         if (not flag):
             print("没有这个学生")
         return flag

     def __delete(self,No):
         flag = False
         for i in range(len(self.students)):
             if (self.students[i].No == No):
                 del self.students[i]
                 print("删除成功")
                 flag = True
                 break
         if(not flag):
             print("没有这个学生")
         return flag

     #用户预输入数据
     def insert(self):
         No = input("NO:")
         name = input("Name:")
         while True:
             sex = input("Sex:")
             if(sex=='男' or sex=='女'):
                 break
             else:
                 print("----Sex数据有误----")
         age = int(input("Age:"))
         if(No!='' or name!=''):
             self.__insert(Student(No,name,sex,age))
         else:
             print("----学号or性别不能为空----")

     def update(self):
         No = input("NO:")
         name = input("Name:")
         while True:
             sex = input("Sex:")
             if (sex == '男' or sex == '女'):
                 break
             else:
                 print("----Sex数据有误----")
         age = int(input("Age:"))
         if (No != '' or name != ''):
             self.__update(Student(NO, name, sex, age))
         else:
             print("----学号or性别不能为空 ----")

     def delete(self):
         No = input("No:")
         if(No != ''):
             self.__delete(No)
     #用户输入
     def scanf(self):
         while True:
             s=input(">>>")
             if (s =='insert'):
                 self.insert()
             elif (s =='update'):
                 self.update()
             elif (s =='delete'):
                 self.delete()
             elif (s =='show'):
                 self.show()
             elif (s =='exit'):
                 break
             else:
                 print("----指令输入错误----")

 s=StudentList()
 s.scanf()

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