save project

1.py

+#-*- coding:utf-8 -*-
+
+import tkinter
+
+win = tkinter.Tk()
+win.geometry("200x100")
+win.title('提示')
+#
+
+win.mainloop()
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2.py

+from tkinter import *
+ 
+class Reg (Frame):
+  def __init__(self,master):
+    frame = Frame(master)
+    frame.pack()
+    self.lab1 = Label(frame,text = "账户:")
+    self.lab1.grid(row = 0,column = 0,sticky = W)
+    self.ent1 = Entry(frame)
+    self.ent1.grid(row = 0,column = 1,sticky = W)
+    self.lab2 = Label(frame,text = "密码:")
+    self.lab2.grid(row = 1,column = 0)
+    self.ent2 = Entry(frame,show = "*")
+    self.ent2.grid(row = 1,column = 1,sticky = W)
+    self.button = Button(frame,text = "登录",command = self.Submit)
+    self.button.grid(row = 2,column = 1,sticky = E)
+    self.lab3 = Label(frame,text = "")
+    self.lab3.grid(row = 3,column = 0,sticky = W)
+    self.button2 = Button(frame,text = "退出",command = frame.quit)
+    self.button2.grid(row = 3,column = 3,sticky = E)
+  def Submit(self):
+    s1 = self.ent1.get()
+    s2 = self.ent2.get()
+    #密码设置
+    if s1 == 'python' and s2 == '123456':
+        self.lab3["text"] = "登陆成功"
+    elif s1 != 'python' and s2 != '123456':
+        self.lab3["text"] = "用户名和密码错误"
+    elif s1 != 'python':
+        self.lab3["text"] = "用户名错误！"
+    elif d != userpassword:
+        print('密码错误，请重新输入！')
+    self.ent1.delete(0,len(s1))
+    self.ent2.delete(0,len(s2))
+root = Tk()
+root.title("登录")
+app = Reg(root)
+root.mainloop()

3.py

+i = 0

diy1.py

 username = "python"    # 保存在服务器数据库中的用户账号（正确的账号）
 userpassword = "123456"    # 保存在服务器数据库中的用户密码（正确的密码）
 
-c = input('请输入账号：')# 请用input()实现用户输入账号、密码的功能
-d = input('请输入密码：')
-
-#判断
-if c == username and d == userpassword:
-    print('登录成功！')
-else:
-    print('登录失败！')
-# 如果用户输入的账号、密码正确，提示登陆成功
\ No newline at end of file
+while True:
+    c = input('请输入账号：')# 请用input()实现用户输入账号、密码的功能
+    d = input('请输入密码：')
+    #判断
+    if c == username and d == userpassword:
+        break
+    elif c != username and d != userpassword:
+        print('用户名和密码错误，请重新输入！')
+    elif c != username:
+        print('用户名不存在，请重新输入！')
+    elif d != userpassword:
+        print('密码错误，请重新输入！')
+print('登录成功！欢迎来到贝尔编程！')
+    # 如果用户输入的账号、密码正确，提示登陆成功
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