@Marvin Can I supply a list of strings as a job variable to my deployment?

Yes, you can supply a list of strings as a job variable to your deployment in Prefect 3.x. You can define job variables in your

prefect.yaml

file and pass them as a dictionary to the

job_variables

argument of the

.deploy()

method. This allows you to customize the deployment with specific variables, which can be accessed in your flow runs. For more details, you can refer to the Prefect documentation on customizing deployments.

@Marvin I am using the

deploy()

function to deploy my flow. Can you show me an example of supplying a list in the job_variables?

To supply a list of strings as a job variable when using the

deploy()

function in Prefect 3.x, you'll need to include it in the

job_variables

dictionary within your

prefect.yaml

file. Here's an example of how you might structure it:

yaml
# prefect.yaml
deployments:
  - name: my-deployment
    entrypoint: path/to/your_flow.py:flow
    job_variables:
      MY_STRING_LIST: 
        - "string1"
        - "string2"
        - "string3"

In your deployment script, you can then call the

deploy()

function from the

prefect.deployments

module. Here's a basic example:

python
from prefect.deployments import deploy

# Deploy the flow with specified job variables
deploy(
    deployments=["my-deployment"],
    work_pool_name="default",
    build=True,
    push=True
)

This will pass the list of strings defined under

MY_STRING_LIST

to your deployment. You can then access this variable in your flow using Prefect's runtime context. For more details, you can refer to the Prefect documentation.

@Marvin Can you show me an example of directly supplying a JSON string as an argument in the

deploy()

function?

To supply a JSON string directly as an argument in the

deploy()

function for job variables, you can convert your JSON string into a Python dictionary using the

json

module. Here's an example:

python
import json
from prefect.deployments import deploy

# JSON string representing job variables
json_string = '{"MY_STRING_LIST": ["string1", "string2", "string3"]}'

# Convert JSON string to a dictionary
job_variables = json.loads(json_string)

# Deploy the flow with job variables
deploy(
    deployments=["my-deployment"],
    work_pool_name="default",
    build=True,
    push=True,
    job_variables=job_variables
)

In this example, the JSON string is first parsed into a Python dictionary using

json.loads()

. The resulting dictionary is then passed to the

deploy()

function as the

job_variables

argument. This allows you to dynamically set job variables from a JSON configuration.