@Marvin I have a flow that receives a dict as an argument. How can I pass values to it when deploying the flow using prefect.yaml?

To pass values to a flow when deploying using

prefect.yaml

, you can specify parameters directly in the YAML file. Here's a brief overview of how you can do this: 1. Specify Parameters in `prefect.yaml`: You can define the parameters in the

prefect.yaml

file under the

parameters

section for your deployment. This allows you to pass the dictionary values directly to the flow. 2. Example Structure:

yaml
   deployments:
     - name: my_deployment
       parameters:
         my_dict_param:
           key1: value1
           key2: value2

3. Ensure Proper Formatting: Make sure to format the dictionary correctly in YAML syntax. Each key-value pair should be indented properly under the parameter name. 4. Reference Environment Variables: If needed, you can also reference environment variables within the

prefect.yaml

for dynamic values. For more detailed information, you can refer to the Prefect YAML Documentation. If you are using Prefect 3.x, remember that flow run parameters must be specified as keyword arguments and are validated before execution. If invalid parameters are provided, the flow will fail to run. For a broader context on Prefect's top-level API, you can explore modules like

flow

,

task

, and

deploy

which are part of its public API.

@Marvin what if one of the dict entries is a string list?

If one of your dictionary entries is a string list, you can represent it directly in the

prefect.yaml

file using YAML's list syntax. Here's how you can do it: 1. YAML List Syntax: Use a dash (

-

) before each item in the list to denote a list in YAML. Ensure that the list is properly indented under the dictionary key. 2. Example Structure:

yaml
   deployments:
     - name: my_deployment
       parameters:
         my_dict_param:
           key1: value1
           key2:
             - string1
             - string2
             - string3

3. YAML Formatting: Ensure that the list items are aligned and indented correctly to avoid syntax errors. This way, your flow will receive the dictionary with one of its entries being a list of strings. This format is compatible with Prefect 3.x and should work seamlessly when deploying your flow.