Argo example to set arguments with Python

workflow.yml

apiVersion: argoproj.io/v1alpha1
kind: Workflow
metadata:
  name: generate-parameters-workflow
  namespace: workflow-prod
  generateName: generate-parameters-
spec:
  entrypoint: Main
  serviceAccount: workflow
  serviceAccountName: workflow
  arguments:
    parameters:
      - name: some-parameter
        value: "1000001"

  templates:
    - name: Main
      failFast: true

      steps:
        - - name: prepare-stage
            template: prepare-template

        - - name: run-step1
            template: run-template
            arguments:
              parameters:
                - name: date-range
                  value: "{{ steps.prepare-stage.outputs.parameters.date-range }}"
                - name: step-name
                  value: Scrapper
                - name: step-slug
                  value: step1

        - - name: run-step2
            template: run-template
            arguments:
              parameters:
                - name: date-range
                  value: "{{ steps.prepare-stage.outputs.parameters.date-range }}"
                - name: step-name
                  value: Cleaning
                - name: step-slug
                  value: step2

    - name: prepare-template
      dag:
        tasks:
          - name: date-range
            template: prepare-date-range
      outputs:
        parameters:
          - name: date-range
            valueFrom:
              parameter: "{{ tasks.date-range.outputs.result }}"

    - name: prepare-date-range
      script:
        image: python:alpine
        command: [python]
        source: |
          from datetime import timezone, datetime, timedelta

          start_date = datetime.now(tz=timezone.utc) - timedelta(days={{inputs.parameters.days}})
          end_date = datetime.now(tz=timezone.utc)
          start_date = start_date.strftime('%Y-%m-%d')
          end_date = end_date.strftime('%Y-%m-%d')

          print(start_date, end_date)
      inputs:
        parameters:
          - name: days
            description: Days that the date range will use. ex. Last 14 days.
            default: "14"

    - name: run-template
      inputs:
        parameters:
          - name: step-name
          - name: step-slug
          - name: date-range
      container:
        image: python:alpine
        command: ["printenv"]
        env:
          - name: SOME_PARAMETER
            value: "{{ workflow.parameters.some-parameter }}"
          - name: STEP_NAME
            value: "{{ inputs.parameters.step-name }}"
          - name: STEP_SLUG
            value: "{{ inputs.parameters.step-slug }}"
          - name: DATE_RANGE
            value: "{{ inputs.parameters.date-range }}"