save project

diy2.py

 username = "python"
 username = "python"
 userpassword = "123456"
 userpassword = "123456"
 while True:
 while True:
-    name = input("请输入用户名:")
-    password = input("请输入密码:")
-    if name == username and password == userpassword:
-        print("登录成功!")
-        break
-    if name != username:
-        print("该用户名不存在.")
-        continue
-    if password != userpassword:
-        print("密码错误！")
+    if i>0:
+        name = input("请输入用户名:")
+        password = input("请输入密码:")
+        i-=1
+        if name == username and password == userpassword:
+            print("登录成功!")
+            break
+        if name != username:
+            print("该用户名不存在.")
+            print("温馨提示：您还有"+str(i)+"次登录机会")
+            continue
+        if password != userpassword:
+            print("密码错误！")
+            print("温馨提示：您还有"+str(i)+"次登录机会")
+        else:
+            print("您的登录机会已用完，请到我司经行身份验证。")
 print("欢迎来到贝尔编程!")
 print("欢迎来到贝尔编程!")
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