auto save

diy4.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('用户名输入错误，请重新输入')
+            continue
+        if password != userpassword:
+            print('密码输入错误，请重新输入')
+    else:
+        print('再1再2不再3，你给我滚')
+        exit()
+print("欢迎来到贝尔编程!")
\ No newline at end of file

shili.py

+i=5
+i *= 3 #   i = i+3
+print(i)
\ No newline at end of file