I have nodered on OpenWRT and have configured exec node to exexute a python code. python /path/xxx.py. The path is correct. The command works fine on CLI. But from nodered exec node throws an error 127, /bin/sh: python not found. Please advise what is the solution?

[image] Colin: Possibly setting all the python related env vars in the node-red startup script (or setting them when you call the python command) would fix it. Bingo, path to PYTHONHOME, PYTHONPATH and LD_LIBRARY_PATH needed to be added to the OpenWRT node_red daemon. Upon stop and start, the…

What are the exact settings of your exec node? What does ls -l /path/xxx.py give you?

The error is saying that python is not found therefore, as @colin said - you need to specify the full path to python. Have you tried what Colin suggested?

I somehow missed @Colin reply but I tried it - which python - reveals /usr/python/bin/python which is strange. I put this on the top of the python code as well as on the exec node as /usr/python/bin/python /path/xxx.py (deploy) but results in the same error, also tried after reboot but same error. "…

[quote="Mansur, post:7, topic:50950"] /usr/python/bin/python /path/xxx.py (deploy) but results in the same error [/quote Does that command work in a terminal? I don't believe that it results in exactly the same error, in node-red. Can you show us the error?

error127 [quote="Mansur, post:7, topic:50950"] "/usr/python/bin/python: error while loading shared libraries: libpython2.7.so.1.0: cannot open shared object file: No such file or directory" [/quote] - (edited/ error added subsequently) CLI command works perfectly everytime:- python /home/pi/Dow…

Here is the snapshot [image] This is a LoRaWAN Gateway with OpenWRT on eMMC. I installed pip upgrade and telepot in this manner, not sure if this could cause this? root@GATEWAY:~# vtysh en con t python pip install --upgrade pip pip install telepot Output: pip in /mnt/mmcblk0p1/pysdk/lib/p…

[image] zenofmud: The path to python should be in the Command option and the path to the python program. Should be in the append option with the msg.option checked off. I hesitate to say so but it seems fundamentally wrong to run a program by specifying the interpreter on the command line. …

OpenWRT did not have pi as a directory but it was created by me since I had flow for raspberry pi previously made and wanted to use here. Also OpenWRT does not use sudo. It also does not recognise the -u command (tried without sudo). I am familiar with raspberry pi but this LoRaWAN Gateway with Ope…

That's what I'm wondering but it's all speculation because I don't have an openwrt machine to experiment with.

Nodered python error127 on OpenWRT /bin/sh: python not found

General

zenofmud 13 September 2021 18:04 10

How are you configuring the exec command?
The path to python should be in the Command option and the path to the python program. Should be in the append option with the msg.option checked off.

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Nodered python error127 on OpenWRT /bin/sh: python not found

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