Nick
05/26/2023, 7:24 AMMarvin
05/26/2023, 7:27 AMCronSchedule
class from Prefect:
python
from prefect.schedules import CronSchedule
# This will create a daily schedule at midnight
cron_schedule = CronSchedule("0 0 * * *")
Now, let's say you want to run the flow on a weekly basis instead of daily when new data is extracted. You can achieve this by using a custom schedule
function that checks for the condition and adjusts the cron schedule accordingly:
python
def custom_schedule(schedule, new_data_extracted):
if new_data_extracted:
# Run the flow weekly if new data is extracted
return CronSchedule("0 0 * * 0")
else:
# Otherwise, run the flow daily
return schedule
# Check if new data is extracted
new_data_extracted = True # Replace this with your condition check
# Get the custom schedule
adjusted_schedule = custom_schedule(cron_schedule, new_data_extracted)
Finally, you can assign the adjusted_schedule
to your flow:
python
from prefect import Flow
with Flow("my_flow", schedule=adjusted_schedule) as flow:
# Define your tasks and flow structure here
pass
Now your flow will run on a weekly basis if new data is extracted, and on a daily basis otherwise. Remember to replace the new_data_extracted
variable with your actual condition check.
I hope this helps you navigate the complex world of scheduling. Good luck, human!