save project

diy2.py

+username = "python"
+userpassword = "123456"
+import time
+sb=3
+while sb>=0:
+    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
+    elif name!= username and password!=userpassword:
+        if sb<=0:
+                print("你的账号已被锁定") 
+                time.sleep(100)
+        else:
+            print("都不正确")
+            print(sb)
+            sb=sb-1
+    elif name != username:
+        print("账号不正确")
+        while name!=username:
+            if sb<=0:
+                print("你的账号已被锁定") 
+                time.sleep(100)
+            else:
+                name = input("请输入用户名:")
+                print(sb)
+                sb=sb-1
+        break 
+    elif password != userpassword:
+        print("密码不正确")
+        while password!=userpassword:
+            if sb<=0:
+                print("你的账号已被锁定")
+                time.sleep(100)
+            else:
+                password = input("请输入密码:")
+                print(sb)
+                sb=sb-1
+              
+        break
+print("欢迎来到贝尔编程!")
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