我在 alicloud 上使用 Ubuntu 20，尝试使用 cl 从 sftp 远程服务器复制到本地时遇到问题：
scp -r -P 22 sftpibas@localhost:/sftpibas dev
但它提高了
protocol error: mtime.sec not present
如果你想在这里查看我的配置，我附上我的 sshd_config：
Include /etc/ssh/sshd_config.d/*.conf
PermitRootLogin yes
ChallengeResponseAuthentication no
UsePAM yes
PrintMotd no
AcceptEnv LANG LC_*
Subsystem sftp /usr/lib/openssh/sftp-server
Match group sftp
ChrootDirectory /home
X11Forwarding no
AllowTcpForwarding no
ForceCommand internal-sftp
我将文件从远程服务器复制到本地的方法是否错误？欢迎任何建议
我有这个数据框：
+------+--------------+------------+
| ID | Education | Score |
+------+--------------+------------+
| 1 | High School | 7.884 |
| 2 | Bachelors | 6.952 |
| 3 | High School | 8.185 |
| 4 | High School | 6.556 |
| 5 | Bachelors | 6.347 |
| 6 | Master | 6.794 |
+------+--------------+------------+
我想创建一个对分数列进行分类的新列。我想给它贴上标签：“差”、“好”、“非常好”。
这可能看起来像这样：
+------+--------------+------------+------------+
| ID | Education | Score | Labels |
+------+--------------+------------+------------+
| 1 | High School | 7.884 | Good |
| …我有 2 个表，看起来像：
user_dataset
+------+---------------+------------+
|userid| Register_time | Country |
+------+---------------+------------+
| 1 | 03/02/17 | TW |
| 2 | 20/03/17 | SG |
| 3 | 26/03/17 | PH |
| 4 | 05/02/17 | VN |
| 5 | 01/10/17 | ID |
| 6 | 03/09/17 | MY |
| ...| ........ | ... |
+------+---------------+------------+
order_dataset
+--------+--------+------------+--------+------------+
|orderid | userid | itemid | gmv | order_time |
+--------+--------+------------+--------+------------+
|1030132 | 3 | 3366770 | 27,0 …