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Python Node

Overview

Use Python Task to create a python-type task and execute python scripts. When the worker executes Python Task, it will generate a temporary python script, and executes the script by the Linux user with the same name as the tenant.

Create Task

  • Click Project Management -> Project Name -> Workflow Definition, and click the Create Workflow button to enter the DAG editing page.
  • Drag from the toolbar to the canvas.

Task Parameter

Parameter Description
Script Python program developed by the user.
Custom parameters It is the user-defined parameters of Python, which will replace the content with ${variable} in the script.

Task Example

Simply Print

This example simulates a common task that runs by a simple command. The example is to print one line in the log file, as shown in the following figure: "This is a demo of python task".

demo-python-simple

print("This is a demo of python task")

Custom Parameters

This example simulates a custom parameter task. We use parameters for reusing existing tasks as template or coping with the dynamic task. In this case, we declare a custom parameter named "param_key", with the value "param_val". Then we use echo to print the parameter "${param_key}" we just declared. After running this example, we would see "param_val" print in the log.

demo-python-custom-param

print("${param_key}")