save project

p.py

+username = "python"    
+userpassword = "123456"
+i=3    
+while True:    
+    name = input("输入用户名:")
+    pawd = input("输入密码:")
+    if username == name and userpassword == pawd:
+        print("登录成功")
+        break
+    if name!=username:
+        print("用户账号出错，请重新输入")
+    else:
+        if i==0