@Marvin 5 minute cron job

Creating a 5-minute cron job in Prefect involves setting up a proper schedule. Here's a snippet of how you can set up the schedule in your

prefect.yaml

file, along with a basic flow example. ### Schedule Configuration: You can define the schedule in the

prefect.yaml

like this:

yaml
deployments:
...
schedules:
  - cron: "*/5 * * * *"
    timezone: "UTC"
    active: true
...

This cron expression

*/5 * * * *

ensures that the flow runs every 5 minutes. ### Example Flow: Here’s a basic Prefect flow:

python
from prefect import flow, task

@task(task_run_name="Adding {x} and {y}")
def add(x: int, y: int) -> int:
    """Just a Python function with a fancy hat on!"""
    return x + y

@flow
def my_flow():
    """Tasks must be called in the flow to be executed (at this time)"""
    first_result = add(1, 2) 
    second_result = add(first_result, first_result)
    return add(first_result, second_result)

if __name__ == "__main__":
    # Run the flow
    my_flow()
    
    # You can run tasks' functions directly outside of a flow if you want
    # but it won't be tracked by Prefect, it's just a normal function
    assert add.fn(1, 2) == 3

### Useful Links: 1. Prefect Schedules 2. Prefect Code Example Feel free to use these references, and if you need any further clarification, let me know!

@Marvin I don't want to use *.yaml

If you prefer not to use

.yaml

files for scheduling, you can programmatically schedule your flows using Prefect's Python API. ### Programmatic Scheduling with Python Here’s how you can create a schedule programmatically using the

CronSchedule

class:

python
from prefect import flow, task
from prefect.deployments import Deployment
from prefect.schedules import CronSchedule

@task
def add(x: int, y: int) -> int:
    return x + y

@flow
def my_flow():
    first_result = add(1, 2) 
    second_result = add(first_result, first_result)
    return add(first_result, second_result)

# Create a deployment with a cron schedule
deployment = Deployment.build_from_flow(
    flow=my_flow,
    name="cron-scheduled-flow",
    schedule=CronSchedule(cron="*/5 * * * *"),  # runs every 5 minutes
)

if __name__ == "__main__":
    deployment.apply()
    # Optionally: Trigger the flow to run immediately for testing
    my_flow()

### Explanation - Flow Definition: Define your flow and tasks as usual. - CronSchedule: Use

CronSchedule

to create a schedule that runs every 5 minutes using the cron expression

*/5 * * * *

. - Deployment: Use

Deployment.build_from_flow

to link the schedule with your flow. - Apply Deployment: Apply the deployment which starts the flow scheduler. ### Useful Links - Prefect Schedules Documentation - Prefect CronSchedule Documentation Feel free to use these references to tweak your setup further. Let me know if you need more assistance!

@Marvin shaking angry fist no dont use build_from_flow use serve and pass a cron

Alright, you can indeed use the

serve

method to create a scheduled flow using a cron expression without relying on a

.yaml

file. Below is an example demonstrating how to set this up: ### Example Flow with

serve

and Cron Schedule

python
from prefect import flow, task

@task
def add(x: int, y: int) -> int:
    return x + y

@flow
def my_flow():
    first_result = add(1, 2)
    second_result = add(first_result, first_result)
    return add(first_result, second_result)

if __name__ == "__main__":
    # Use serve to create a cron schedule for the flow
    my_flow.serve(name="cron-scheduled-flow", cron="*/5 * * * *")

### Explanation - Flow and Task Definition: Define your tasks and flow as usual. - Cron Schedule: Use the

serve

method with the

cron

parameter to specify a cron expression (

*/5 * * * *

for running every 5 minutes). ### Applying the Deployment Run the script to apply the deployment and start the scheduler as follows:

sh
python script_name.py

This will schedule your flow to run every 5 minutes according to the cron expression provided. ### Useful Links - Prefect Schedules Documentation - Prefect `serve` Method Example (Documentation Reference) Feel free to adapt the example to suit your needs. Let me know if you have more questions or need further assistance!