save project

diy2.py

+username = "python"
+userpassword = "123456"
+i=0
+while True:
+    if i == 3
+       break
+    else:
+        i+=1
+        
+    name = input("请输入用户名:")
+    password = input("请输入密码:")
+    if name == username
+
+        print("登录成功!")
+
+        break
+        else:
+        if name =username:
+            if password ==username :
+                print("登陆成功!")
+                print("欢迎来到贝尔编程！")
+                break
+            else:
+                print("密码错误！")
+                print("您还有"+str(3-i)+"次机会")
+        else:
+            print("密码错误！") 
+            print
+    
+print("欢迎来到贝尔编程!")
\ No newline at end of file