save project

diy.py

-# # 写入同学们的捐赠明细：'小兰：12本'、'小丽：11本'、'李文：9本'、'张伟：16本'
-# a=open(r"D:\book.txt","w",encoding="utf-8")
-# a.write("小兰：12本")
-# a.close()
-
-with open(r"D:\book.txt","r",encoding="utf-8") as a:
-     for data in a:
-         if "小兰：12本" in data:
-             print("数据在文件里")
\ No newline at end of file
+i=3
+userpassword="123456"
+username="python"
+while True:
+    if i>0:
+        a=input("请输入账号")
+        b=input("请输入密码")
+        i=i-1
+        if a==username and b==userpassword:
+            print("登录成功")
+        if a!=username:
+            print("账号错误")
+            print("")
+        if b!=userpassword:
+        print("错误")
\ No newline at end of file