save project

python.py

+username="华南虎"
+userpossword="20090825"
+while True:
+    name=input("请输入用户名:")
+    possword=input("请输入密码:")
+    if name==username and userpossword==possword:
+        print("登录成功,欢迎华南虎来到贝尔编程")
+        break
+    elif name!=username:
+        print("用户名不存在请重新输入")
+    else :
+        print("密码错误请重新输入")
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