@Marvin How to add global variables to the Python code and use it in flows and tasks functions?

To add global variables to your Python code and use them within Prefect flows and tasks, you can use Prefect's variable management features. Here's a concise guide: 1. Define Variables in Prefect UI or API: - You can create and manage variables via the Prefect UI or API. This allows you to set global variables that can be accessed in your flows and tasks. - In the Prefect UI, navigate to the Variables page to create or modify variables. You can also use the Prefect CLI with commands like

prefect variable set

to create or update variables. 2. Access Variables in Python Code: - Use Prefect's Python SDK to interact with these variables. You can retrieve variable values using methods like

get

within your flow or task functions. - Example:

python
     from prefect import flow, task
     from prefect.variables import get

     @task
     def my_task():
         my_var = get('MY_VARIABLE_NAME')
         print(f"Variable value: {my_var}")

     @flow
     def my_flow():
         my_task()

     if __name__ == "__main__":
         my_flow()

3. Use Variables in Prefect YAML: - For deployments, you can define variables in

prefect.yaml

files or pass them as job variables during deployment. For more details, you can refer to the Prefect documentation on variables and customizing infrastructure. Remember, these methods assume you are using Prefect 3.x, as it has specific features for variable management.

@Marvin In Python script is possible to add global variables at the top of the file so they can be reused in functions after like:

my_variable = "something"

def function():
    print(my_variable)

How to do that with Prefect?

In Prefect, you can define global variables at the top of your Python script just like you would in a regular Python script. These variables can then be accessed within your Prefect tasks and flows. Here's how you might structure your code:

python
# Define a global variable
my_variable = "something"

from prefect import flow, task

@task
def function():
    # Access the global variable
    print(my_variable)

@flow
def my_flow():
    function()

if __name__ == "__main__":
    my_flow()

### Key Points: - Global Scope: The variable

my_variable

is defined at the top level of the script, making it accessible within the

function

task. - No Special Prefect Handling Required: Prefect tasks and flows can access global variables defined in the same script without any special handling. This approach works seamlessly with Prefect as it does with any standard Python script, allowing you to maintain an imperative programming style.