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Run Python code on n8n

Home Page: https://www.npmjs.com/package/n8n-nodes-python

License: Other

TypeScript 90.64% JavaScript 2.50% Python 6.86%

n8n n8n-nodes python python3 workflow automation n8n-nodes-python

n8n-nodes-python's Issues

Error when importing workflow.json

Hi, I'm getting the following error when importing workflow.json and the build is failing:

An error occurred while importing workflows. See log messages for details.
Cannot update entity because entity id is not set in the entity.

This only occurs with the more recent packages, I have reverted to using 0.210.2-debian and the build works.

Question: How to access the binary data?

Is this possible to access binary data? Do you have examples? Like item.binary in JavaScript.

ERROR: spawn E2BIG [Line 408]

when there are hundreds items this python node will report the error as below:

Error fetching feature flags ReferenceError: AbortSignal is not defined

Hello, I have an error message Error fetching feature flags ReferenceError: AbortSignal is not defined when using PythonFunction. The process freezes for 10 seconds, and the result of the test script is displayed correctly, but this error occurs in the log.

Can it come from my nginx proxy manager reverse proxy?

Error 1:

Error fetching feature flags ReferenceError: AbortSignal is not defined
    at PostHog.<anonymous> (/usr/lib/node_modules/n8n/node_modules/posthog-core/src/index.ts:460:6)
    at step (/usr/lib/node_modules/n8n/node_modules/node_modules/tslib/tslib.es6.js:102:23)
    at Object.next (/usr/lib/node_modules/n8n/node_modules/node_modules/tslib/tslib.es6.js:83:53)
    at /usr/lib/node_modules/n8n/node_modules/node_modules/tslib/tslib.es6.js:76:71
    at new Promise (<anonymous>)
    at __awaiter (/usr/lib/node_modules/n8n/node_modules/node_modules/tslib/tslib.es6.js:72:12)
    at PostHogCoreStateless.fetchWithRetry (/usr/lib/node_modules/n8n/node_modules/posthog-node/lib/index.cjs.js:1063:16)
    at PostHog.<anonymous> (/usr/lib/node_modules/n8n/node_modules/posthog-core/src/index.ts:219:17)
    at step (/usr/lib/node_modules/n8n/node_modules/node_modules/tslib/tslib.es6.js:102:23)
    at Object.next (/usr/lib/node_modules/n8n/node_modules/node_modules/tslib/tslib.es6.js:83:53)
    at /usr/lib/node_modules/n8n/node_modules/node_modules/tslib/tslib.es6.js:76:71
    at new Promise (<anonymous>)
    at __awaiter (/usr/lib/node_modules/n8n/node_modules/node_modules/tslib/tslib.es6.js:72:12)
    at PostHogCoreStateless.getDecide (/usr/lib/node_modules/n8n/node_modules/posthog-node/lib/index.cjs.js:833:16)
    at PostHog.<anonymous> (/usr/lib/node_modules/n8n/node_modules/posthog-core/src/index.ts:318:39)
    at step (/usr/lib/node_modules/n8n/node_modules/node_modules/tslib/tslib.es6.js:102:23)
    at Object.next (/usr/lib/node_modules/n8n/node_modules/node_modules/tslib/tslib.es6.js:83:53)
    at /usr/lib/node_modules/n8n/node_modules/node_modules/tslib/tslib.es6.js:76:71
    at new Promise (<anonymous>)
    at __awaiter (/usr/lib/node_modules/n8n/node_modules/node_modules/tslib/tslib.es6.js:72:12)
    at PostHogCoreStateless.getFeatureFlagsAndPayloadsStateless (/usr/lib/node_modules/n8n/node_modules/posthog-node/lib/index.cjs.js:950:16)
    at PostHog.<anonymous> (/usr/lib/node_modules/n8n/node_modules/posthog-core/src/index.ts:306:24)
    at step (/usr/lib/node_modules/n8n/node_modules/node_modules/tslib/tslib.es6.js:102:23)
    at Object.next (/usr/lib/node_modules/n8n/node_modules/node_modules/tslib/tslib.es6.js:83:53)
    at /usr/lib/node_modules/n8n/node_modules/node_modules/tslib/tslib.es6.js:76:71
    at new Promise (<anonymous>)
    at __awaiter (/usr/lib/node_modules/n8n/node_modules/node_modules/tslib/tslib.es6.js:72:12)
    at PostHog.call [as getFeatureFlagsStateless] (/usr/lib/node_modules/n8n/node_modules/posthog-node/lib/index.cjs.js:937:16)
    at PostHog.capture (/usr/lib/node_modules/n8n/node_modules/posthog-node/src/posthog-node.ts:106:38)
    at PostHogClient.track (/usr/lib/node_modules/n8n/src/posthog/index.ts:39:17)
    at /usr/lib/node_modules/n8n/src/telemetry/index.ts:193:20
    at new Promise (<anonymous>)
    at Telemetry.track (/usr/lib/node_modules/n8n/src/telemetry/index.ts:177:10)
    at InternalHooks.onWorkflowPostExecute (/usr/lib/node_modules/n8n/src/InternalHooks.ts:371:22)
    at processTicksAndRejections (internal/process/task_queues.js:95:5)

Error 2:
Could not initialize license manager sdk

Test python script:

new_items = []
for item in items:
		item['newField'] = 'newValue'
		new_items.append(item)
return new_items # should return a list

I use this docker-compose file with portainer:

version: '3.8'

services:
  n8n:
    image: naskio/n8n-python:latest-debian # use this if intended to use heavy python packages
    #    image: naskio/n8n-python # alpine for light python packages
    #    command: /bin/sh -c "n8n start"
    restart: always
    container_name: n8n
    environment:
      - GENERIC_TIMEZONE=Europe/Moscow
      - TZ=Europe/Moscow
      - N8N_HOST=n8n.[HIDE DOMAIN]
      - N8N_PROTOCOL=https
      - N8N_PORT=443
      - VUE_APP_URL_BASE_API=https://n8n.[HIDE DOMAIN]/
      - WEBHOOK_TUNNEL_URL=https://n8n.[HIDE DOMAIN]/
      - N8N_EDITOR_BASE_URL=https://n8n.[HIDE DOMAIN]/
      - DB_TYPE=mariadb
      - DB_MYSQLDB_HOST=mariadb
      - DB_MYSQLDB_PORT=3306
      - DB_MYSQLDB_DATABASE=n8n
      - DB_MYSQLDB_USER=n8n
      - DB_MYSQLDB_PASSWORD=[HIDE PASSWORD]
    ports:
      - "127.0.0.1:5678:443"
      
    volumes:
      - /home/n8n_data:/home/node/
      - /home/n8n_data/local-files:/data # by default workdir == /data
      - /home/n8n_data/python_scripts:/data/py_scripts
      - /home/n8n_data/requirements.txt:/data/requirements
      
volumes:
  n8n_data:
  
networks:
  default:
    external: true
    name: evilcorp

Debian docker image outdated

Hi,
the n8n-python:latest-debian image still uses N8N_VERSION=0.227.0
Can please update it to the latest

ERROR: exitCode: 0 spawn python3 ENOENT

Hi!

I'm testing this node but the 'ERROR: exitCode: 0 spawn python3 ENOENT [Line xxx]' cames on every code tested.

For example:

new_items = []
for item in items:
		item['newField'] = 'newValue'
		new_items.append(item)
return new_items # should return a list

print(items)
# > list
return items

n8n: v0.224.1
n8n-nodes-python: v0.1.4

It seems to be a problem with the path on the node.js code:
https://stackoverflow.com/questions/55033450/spawn-python-enoent-node-js-in-windows
https://stackoverflow.com/questions/58390884/how-to-fix-error-spawn-py-enoent-error-when-running-python-script-from-electr
https://stackoverflow.com/questions/47099422/error-spawn-python-enoent

PythonFunction: Node does not require credentials

Problem executing workflow
There was a problem executing the workflow:
"PythonFunction: Node does not require credentials"

Error when parsing output of PythonFunction

According the error message, the output stderr contains invalid token /. But I am sure that the code in the PythonFunction.node is correct.

How can I get the stderr of PythonFunction.node

Report a bug in PythonFunction.node.ts

hi Naskio,

I encountered a troublesome issue in the n8n.
I think it might be a bug in this code

In line 195, the code 0 represent success, but the stderr will be parse.

if (!code) { returnData.items = parseShellOutput(returnData.stderr); } else { returnData.error = new Error(returnData.stderr); }

Question: How to receive value from previous nodes?

Hey @naskio Thanks for putting this package together. Do you have examples of how we can receive the items from previous nodes? Cheers

Getting OOM error while running python node

getting the following error: n8n may have run out of memory while executing it while executing an HTML parsing job.

n8n was assigned 20g ram, so there is no way the execution on this node would run oom.
I wonder if there is a memory limit on the node itself. How can I config this limit?

import Python modules in py_scripts directory

I have the following a test.py script in my py_scripts directory, How can I import the test.py script using the python function node.

Can't run python with npm package

Hi,
I install package with community package on n8n via : https://www.npmjs.com/package/n8n-nodes-python
i set up creadential like this : (i don"t know if the right way)

Then if i run python command it won't work :

cant find python path ?

If i run execute node with python command is working.

n8n is install on windows 10 machine with npm, following this step : https://docs.n8n.io/hosting/installation/npm/
Latest n8n
Latest nodejs
Running on windows 10 and python 3.9 is install and working.

No Python Node

Hi There

After installing naskio/n8n-python:latest via docker-compose following the requirements I did not find the "Python Node"

Am I missing something?

Note:
My n8n is running using Postgres and everything else is working 100% as intended.
I also currently have no "Scripts" in the python scripts folder as I first want to see how everything works.

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