From Python script to Node RED

General
1

Hello there,

Is there a way to execute a while python script in my PC and display this informations one by one in Node-RED?

My Python script is:

count = 0
while count < 10:
print(‘Hello’)
count += 1
But what displays in the screen is:

{“topic”:"","_msgid":“6287885c.42fc38”,“payload”:“Hello\nHello\nHello\nHello\nHello\nHello\nHello\nHello\nHello\nHello\n”,“rc”:{“code”:0}}

How can I displays these information in separate payloads without having to run the script over and over?

2

If that’s your real script why not recreate it in javascript?

If you really want use python how are you executing the python script? are you using the contrib-node or are you using the exec node?

3

If the only point is to separate the payloads why not to use the standard split node from the pallete?

image
image.png792×520 21.7 KB

4

Thank you for the reply!
I am using exec node.
This script is an exemple for a bigger one, and unfortunately I can’t use a python3 function node.

5

Thank you for the reply.
I have another python script that has not built-in libraries, my idea is to use Exec Node to run this script and the script will run a while for an undetermined time.

6

add a delay in the python script and set the exec node output to:
while the command is running - spawn mode

#!/user/bin/python
import time
count = 0
while count < 10:
	print('Hello')
	count += 1
	time.sleep(1)
1 Like
7

oh my god, thank you for the reply!
The change exec node output solve my problem o/

8

Hi, I'm trying to do something similar, but I need to have a message for each print within the loop.
Now I can only get one message at the and of the script. This since I have a never ending while loop.
Of course I set the node in spawn mode
Thanks

9

is this using a python script ? If so did you use the -u option as per the info ?

1 Like
10

Done :slight_smile:
just putting "python -u patch" instead of "python patch" in the exec node command
thanks a lot