1.首先选定一个目录和文件夹，在其中新建如下几个文件。

图1

2.本文的路径和目录是，在编辑时自己可以根据个人的路径和目录适当调整，否则csv文件到时候打不开。

3.main.py代码

from tkinter import *  from LoginPage import *   #导入loginpage.py文件，里面有该窗口的相关设定root = Tk()  root.title('Python成绩管理系统v1.0')  root.geometry('1200x800+500+0')#其实这里只能设定+500+0的位置设定，大小需要回到loginpage.py中设定LoginPage(root)  root.mainloop()

4.LoginPage.py代码

from tkinter import *  from tkinter.messagebox import *  from MainPage import *  #定义class LoginPage(object):      def __init__(self, master=None):          self.root = master #定义内部变量root          self.root.geometry('1200x800+500+0')        self.username = StringVar()          self.password = StringVar()          self.createPage()      def createPage(self):        self.page = Frame(self.root) #创建Frame          self.page.pack()          Label(self.page).grid(row=0, stick=W)          Label(self.page, font=10,text = '账户: ').grid(row=1, stick=W, pady=10)          Entry(self.page, font=10,textvariable=self.username).grid(row=1, column=1, stick=E)          Label(self.page, font=10,text = '密码: ').grid(row=2, stick=W, pady=10)          Entry(self.page, font=10,textvariable=self.password, show='*').grid(row=2, column=1, stick=E)         #三个按钮        Button(self.page, font=10,text='登陆', command=self.loginCheck).grid(row=3, column=0, pady=5)        Button(self.page,font=10, text='注册', command=self.register).grid(row=3, column=1, pady=5)          Button(self.page, font=10,text='退出', command=self.page.quit).grid(row=3, column=2, pady=5)    def loginCheck(self):          name = self.username.get()          password = self.password.get()        if self.isLegalUser(name,password):            self.page.destroy()              MainPage(self.root)          else:              showinfo(title='错误', message='账号或密码错误！')    def isLegal(self,string):        alp = ['a','b','c','d','e','f','g','h','i','j','k','l','m','n','o','p','q','r','s','t','u','v','w','x','y','z']        for i in string:            if i in alp:                pass            else:                return False        return True    def isLegalUser(self,name,password):       #注意路径和目录，根据个人适当调整        f = open('/home/xgj/xgjpython/Python成绩管理系统（精简版）/账号密码.csv','r',encoding='utf-8')        for line in f.readlines():            info = line[:-1].split(",")            if len(info)<2:                break            if info[0].strip()==name and  info[1].strip()==password :                 f.close()                 return True        return False    def register(self):        name = self.username.get()          password = self.password.get()        if len(name)==0 or len(password)==0:            showinfo(title='错误', message='账号密码不能为空')            return        for i in password:            if i ==',' or i =='':                showinfo(title='错误', message='密码不能含有非法字符')                return        if self.isLegal(name):            pass        else:            showinfo(title='错误', message='账号不能含有非法字符')            return        f = open('/home/xgj/xgjpython/Python成绩管理系统（精简版）/账号密码.csv','r',encoding='utf-8')        for line in f.readlines():            info = line[:-1].split(",")            if len(info)<2:                break            if info[0].strip()==name:                 messagebox.showinfo(title='结果', message ="已存在该用户信息！")                 f.close()                 return        f.close()        f = open('/home/xgj/xgjpython/Python成绩管理系统（精简版）/账号密码.csv','a',encoding='utf-8')        f.write('{},{}\n'.format(name,password))        f.close()        messagebox.showinfo(title='提示', message ="注册成功")

5.MainPage.py代码

from tkinter import *  from view import *  #菜单栏对应的各个子页面  #定义类：MainPage（.py）作为模块，之后可以引用class MainPage(object):      def __init__(self, master=None):          self.root = master #定义内部变量root          self.root.geometry('%dx%d' % (1000, 800)) #设置窗口大小          self.createPage()      def createPage(self):          self.inputPage = InputFrame(self.root) # 创建不同Frame          self.deletePage = DeleteFrame(self.root)        self.modifyPage = ModifyFrame(self.root)        self.queryPage = QueryFrame(self.root)         self.inputPage.pack() #默认显示数据录入界面          menubar = Menu(self.root)  #菜单的四个        menubar.add_command(label='增', font=10,command = self.inputData)          menubar.add_command(label='删', font=10,command = self.deleteData)          menubar.add_command(label='改', font=10,command = self.modifyData)          menubar.add_command(label='查',font=10, command = self.queryData)          self.root['menu'] = menubar  # 设置菜单栏      def inputData(self):  #增-定义增加的处理        self.inputPage.pack()          self.queryPage.pack_forget()          self.deletePage.pack_forget()        self.modifyPage.pack_forget()     def deleteData(self):  #删        self.inputPage.pack_forget()          self.queryPage.pack_forget()          self.deletePage.pack()          self.modifyPage.pack_forget()    def modifyData(self):  #改        self.inputPage.pack_forget()          self.queryPage.pack_forget()          self.deletePage.pack_forget()          self.modifyPage.pack()             def queryData(self):  #查        self.inputPage.pack_forget()          self.queryPage.pack()          self.deletePage.pack_forget()          self.modifyPage.pack_forget()    

6.view.py代码

from tkinter import *  from tkinter.messagebox import *  #定义class InputFrame(Frame): # 继承Frame类      def __init__(self, master=None):          Frame.__init__(self, master)          self.root = master #定义内部变量root          self.E1 = Entry(self,font=10) #录入信息的条框设置，包括字体大小和颜色        self.E2 = Entry(self,font=10)        self.E3 = Entry(self,font=10)        self.E4 = Entry(self,font=10)        self.E5 = Entry(self,font=10)        self.E6 = Entry(self,font=10)        self.createPage()      def Isspace(self,text):        temp = 0        for i in text:           if not i.isspace():               temp = 1               break        if temp==1:            return 0        else:            return 1    def write(self,name,num,course,score):        f = open('/home/xgj/xgjpython/Python成绩管理系统（精简版）/成绩.csv','r',encoding='utf-8')        for line in f.readlines():            info = line[:-1].split(",")            if len(info)<4:                break            if info[1] ==num and info[2] ==course:                 messagebox.showinfo(title='结果', message ="已存在该学生科目信息！")                 f.close()                 return        f.close()        f = open('/home/xgj/xgjpython/Python成绩管理系统（精简版）/成绩.csv','a',encoding='utf-8')        f.write('{},{},{},{}\n'.format(name,num,course,score))        f.close()        messagebox.showinfo(title='提示', message ="写入成功")        return    def click(self):        name = self.E1.get()        num = self.E2.get()        course = self.E3.get()        score = self.E4.get()        if self.Isspace(name) or self.Isspace(num) or self.Isspace(course) or self.Isspace(score) :            messagebox.showinfo(title='提示', message ="输入项为空")        else:            self.write(name,num,course,score)    def createPage(self):   #定义录入界面        Label(self).grid(row=0, stick=W, pady=10)        Label(self, font=10,text = '姓名: ').grid(row=1, stick=W, pady=10)        self.E1.grid(row=1, column=1,stick=E)        Label(self,  font=10,text = '学号: ').grid(row=2, stick=W, pady=10)        self.E2.grid(row=2, column=1, stick=E)        Label(self,  font=10,text = '科目: ').grid(row=3, stick=W, pady=10)         self.E3.grid(row=3, column=1, stick=E)         Label(self,  font=10,text = '成绩: ').grid(row=4, stick=W, pady=10)        self.E4.grid(row=4, column=1, stick=E)               Button(self,  font=10,text='录入',command=self.click).grid(row=6, column=1, stick=E, pady=10)  class DeleteFrame(Frame): # 继承Frame类      def __init__(self, master=None):          Frame.__init__(self, master)          self.root = master #定义内部变量root        self.E1 = Entry(self,font=10)        self.E2 = Entry(self,font=10)        self.createPage()    def Isspace(self,text):        temp = 0        for i in text:           if not i.isspace():               temp = 1               break        if temp==1:            return 0        else:            return 1    def delete(self,num,course):        temp = 0        with open("/home/xgj/xgjpython/Python成绩管理系统（精简版）/成绩.csv","r",encoding="utf-8") as f:            lines = f.readlines()           with open("/home/xgj/xgjpython/Python成绩管理系统（精简版）/成绩.csv","w",encoding="utf-8") as f_w:            for line in lines:                info = line[:-1].split(",")                if info[1] ==num and info[2] ==course:                    temp = 1                    continue                f_w.write(line)        if temp==0:            messagebox.showinfo(title='提示', message ="没有该信息")        else:            messagebox.showinfo(title='提示', message ="删除成功")    def click(self):        num = self.E1.get()        course = self.E2.get()        if self.Isspace(num) or self.Isspace(course):            messagebox.showinfo(title='提示', message ="输入项为空")        else:            self.delete(num,course)    def createPage(self):        Label(self).grid(row=0, stick=W, pady=10)        Label(self,  font=10,text = '学号: ').grid(row=1, stick=W, pady=10)        self.E1.grid(row=1, column=1, stick=E)        Label(self, font=10, text = '科目: ').grid(row=2, stick=W, pady=10)        self.E2.grid(row=2, column=1, stick=E)        Button(self, font=10, text='删除',command=self.click).grid(row=6, column=1, stick=E, pady=10)  #定义改的界面class ModifyFrame(Frame): # 继承Frame类      def __init__(self, master=None):          Frame.__init__(self, master)          self.root = master #定义内部变量root          self.E1 = Entry(self,font=10)        self.E2 = Entry(self,font=10)        self.E3 = Entry(self,font=10)        self.E4 = Entry(self,font=10)        self.E5 = Entry(self,font=10)        self.createPage()      def Isspace(self,text):        temp = 0        for i in text:           if not i.isspace():               temp = 1               break        if temp==1:            return 0        else:            return 1    def modify(self,name,num,course,score):        temp = 0        with open("/home/xgj/xgjpython/Python成绩管理系统（精简版）/成绩.csv","r",encoding="utf-8") as f:            lines = f.readlines()        with open("/home/xgj/xgjpython/Python成绩管理系统（精简版）/成绩.csv","w",encoding="utf-8") as f_w:            for line in lines:                info = line[:-1].split(",")                if info[1] ==num and info[2] ==course:                    temp = 1                    f_w.write('{},{},{},{}\n'.format(name,num,course,score))                    continue                f_w.write(line)        if temp==0:            messagebox.showinfo(title='提示', message ="没有该信息")        else:            messagebox.showinfo(title='提示', message ="修改成功")    def click(self):        name = self.E1.get()        num = self.E2.get()        course = self.E3.get()        score = self.E4.get()        if self.Isspace(name) or self.Isspace(num) or self.Isspace(course) or self.Isspace(score) :            messagebox.showinfo(title='提示', message ="输入项为空")        else:            self.modify(name,num,course,score)    def createPage(self):          Label(self).grid(row=0, stick=W, pady=10)        Label(self,  font=10,text = '姓名: ').grid(row=1, stick=W, pady=10)        self.E1.grid(row=1, column=1, stick=E)        Label(self, font=10, text = '学号: ').grid(row=2, stick=W, pady=10)        self.E2.grid(row=2, column=1, stick=E)        Label(self, font=10, text = '科目: ').grid(row=3, stick=W, pady=10)         self.E3.grid(row=3, column=1, stick=E)         Label(self,  font=10,text = '成绩: ').grid(row=4, stick=W, pady=10)        self.E4.grid(row=4, column=1, stick=E)               Button(self, font=10, text='修改',command=self.click).grid(row=6, column=1, stick=E, pady=10)  class QueryFrame(Frame): # 查--查询--query    def __init__(self, master=None):          Frame.__init__(self, master)          self.root = master #定义内部变量root        self.E1 = Entry(self,font=10)        self.E2 = Entry(self,font=10)        self.createPage()      def Isspace(self,text):        temp = 0        for i in text:           if not i.isspace():               temp = 1               break        if temp==1:            return 0        else:            return 1    def query(self,num,course):        f = open('/home/xgj/xgjpython/Python成绩管理系统（精简版）/成绩.csv','r',encoding='utf-8')        for line in f.readlines():            info = line[:-1].split(",")            if info[1] ==num and info[2] ==course:                 messagebox.showinfo(title='结果',message ="姓名："+info[0] +"\n学号:"+info[1] +"\n科目:"+info[2] +"\n成绩:"+info[3] )                 f.close()                 return        messagebox.showinfo(title='提示', message ="没有该信息")        f.close()        return            def click(self):        num = self.E1.get()        course = self.E2.get()        if self.Isspace(num) or self.Isspace(course):            messagebox.showinfo(title='提示', message ="输入项为空")        else:            self.query(num,course)    def createPage(self):        Label(self).grid(row=0, stick=W, pady=10)        Label(self, font=10, text = '学号: ').grid(row=1, stick=W, pady=10)        self.E1.grid(row=1, column=1, stick=E)        Label(self,  font=10,text = '科目: ').grid(row=2, stick=W, pady=10)        self.E2.grid(row=2, column=1, stick=E)        Button(self, font=10, text='查找',command=self.click).grid(row=6, column=1, stick=E, pady=10)    

7.在文件夹内新建两个csv文件：成绩.csv和账号密码.csv

7.1 可以用excel新建

7.2 注意账号密码.csv的表头和name、password，如图2

7.3 成绩.csv可以只设表头名：成绩，里面内容可以是空的。

8.操作一下，看gif示例：

9.当然，你的先注册：admin和123，很简单，怎么样？喜欢吗？还可以多注册几个账号和密码，适用不同人使用。