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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