From 6ccefe9891302176f54228cfffe446ed156c1d8b Mon Sep 17 00:00:00 2001
From: wade zhang <95411902+gccgdb1234@users.noreply.github.com>
Date: Mon, 29 May 2023 08:23:31 +0800
Subject: [PATCH] Update 09-udf.md

---
 docs/en/07-develop/09-udf.md | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/docs/en/07-develop/09-udf.md b/docs/en/07-develop/09-udf.md
index d7a3fbd032..51c4c112c0 100644
--- a/docs/en/07-develop/09-udf.md
+++ b/docs/en/07-develop/09-udf.md
@@ -667,7 +667,7 @@ grep 'sys path' taospyudf.log  | tail -1
 
 You may find that the default library search path is `/lib/python3/dist-packages` (just for example, it may be different in your system), but `moment` is installed to `/usr/local/lib/python3.8/dist-packages` (for example, it may be different in your system). Then we change the library search path of python UDF.
 
-Check `sys.path`
+Check `sys.path`, which must include the packages you install with pip3 command previously, as shown below:
 
 ```python
 >>> import sys
@@ -683,6 +683,8 @@ UdfdLdLibPath /usr/lib/python3.8:/usr/lib/python3.8/lib-dynload:/usr/local/lib/p
 
 Save it, then restart `taosd`, using `systemctl restart taosd`, and test again, it will succeed this time.
 
+Note: If your cluster consists of multiple `taosd` instances, you have to repeat same process for each of them.
+
 ```sql
 taos> select ts, nextsunday(ts) from t;
            ts            | nextsunday(ts) |
-- 
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