import stepfunctions
from stepfunctions.workflow import Workflow
from stepfunctions.steps import *

workflow_execution_role = "<ENTER A VALID EXECUTION ROLE>"
hello_workflow_name='hello_workflow'
hello_step = Pass(state_id="HelloWorld")

# creating a demo workflow
hello_workflow = Workflow(
    name=hello_workflow_name, 
    definition=hello_step, 
    role=workflow_execution_role
)
hello_workflow_arn = hello_workflow.create()

# now trying to update the existing workflow with tags
hello_workflow_update = Workflow(
    name=hello_workflow_name, 
    definition=hello_step, 
    role=workflow_execution_role,
    state_machine_arn = hello_workflow_arn,
    tags=[
        {"key": "Environment", "value": 'example'},
        {"key": "Owner", "value": 'Lasdem'},
    ]
)
hello_workflow_update.update(hello_step)