save project

diy2.py

+i=3
+username = "python"
+userpassword = "123456"
+while True:
+    if i>0:
+        name = input("用户名:")
+        password = input("密码:")
+        i-=1
+        if name == username and password == userpassword:
+            print("登录成功")
+            break
+        if name == username:
+            if password != userpassword:
+                print("密码错误")
+                print("温馨提示：您还有"+str(i)+"次机会")
+        if name != username:
+            print("用户名错误")
+    else:
+        print("账户已锁定")
+print("登录中……")