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Loops

Note

This example is a replication of an Argo Workflow example in Hera. The upstream example can be found here.

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from hera.workflows import Container, Parameter, Steps, Workflow

with Workflow(generate_name="loops-", entrypoint="loop-example") as w:
    print_message = Container(
        name="print-message",
        inputs=Parameter(name="message"),
        image="busybox",
        command=["echo"],
        args=["{{inputs.parameters.message}}"],
    )

    with Steps(name="loop-example"):
        print_message(
            name="print-message-loop",
            arguments={"message": "{{item}}"},
            with_items=["hello world", "goodbye world"],
        )

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apiVersion: argoproj.io/v1alpha1
kind: Workflow
metadata:
  generateName: loops-
spec:
  entrypoint: loop-example
  templates:
  - name: print-message
    container:
      image: busybox
      args:
      - '{{inputs.parameters.message}}'
      command:
      - echo
    inputs:
      parameters:
      - name: message
  - name: loop-example
    steps:
    - - name: print-message-loop
        template: print-message
        withItems:
        - hello world
        - goodbye world
        arguments:
          parameters:
          - name: message
            value: '{{item}}'

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