save project

diy2.py

+username = "python"
+userpassword = "123456"
+i=3
+while True:
+    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('用户名错误')
+            print('还剩'+str(i)+'次')
+            continue 
+        if password!= userpassword:
+            print('密码错误')
+            print('还剩'+str(i)+'次')
+    else:
+         print('被锁进')
+         exit()
+print("欢迎来到贝尔编程!")
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