save project

diy2.py

+username = "python"
+userpassword = "123456"
+i=3
+while True:
+    name = input("请输入用户名:")
+    password = input("请输入密码:")
+    i=i-1
+    if i==2:
+        print("还剩两次机会")
+    if i==1:
+        print("还剩一次机会")
+    if i==0:
+        print("账户已锁定，请带身份证来解锁")
+        break
+    if name == username and password == userpassword:
+        print("登录成功!")
+        print("欢迎来到贝尔编程!")
+        break
+    if name != username:
+        print("账号不存在,请重新输入")
+        continue
+    if name== username and password !=userpassword:
+        print("密码错误，请重新输入")
+    
+
+
+