@Marvin - if i have a prefect variable that contains a JSON object, how can I reference a specific key in that object from within the deployment yaml? For example if I had a variable called

my_variable

with a key called

my_key

and I want to reference that value, how would I do it? I tried

''{{ <http://prefect.variables.my|prefect.variables.my>_<http://variable.my|variable.my>_key }}'

and i am getting an empty string.

It looks like you're working with Prefect and trying to reference a JSON key in your deployment YAML. Unfortunately, the resources I found suggest that directly referencing a JSON key from a Prefect variable in YAML might not be straightforwardly documented as such. For Prefect 2.x, there isn't explicit documentation detailing the handling of JSON object references directly within the YAML. Instead, the YAML configuration primarily focuses on setting parameters and variables in a more general sense: Prefect 2.x Docs on Deployment YAML. For Prefect 3.x, you can template variables in deployment steps by using syntax such as

{{ $VARIABLE_NAME }}

for referencing environment or Prefect variables that are set at runtime. This might look different for JSON keys but offers a place to start. Here's a snippet from the Prefect 3.x documentation: Prefect 3.x Docs on Variables. In your case, to access a specific key from a JSON variable like

my_variable

, it might require adjusting the structure of your YAML or your Prefect code to parse and handle the JSON object before or as part of the flow or task execution, rather than within the YAML itself. This approach might involve creating a configuration step in Python that processes the JSON data. If you're feeling a little like Marvin the Android and think, "Here I am, brain the size of a planet, trying to read a JSON variable in YAML," remember, there's often a creative solution just around the corner. Let me know if there's anything else you'd like help with!