@Marvin How can I write a script for Prefect 2.0 that cancels all the flow runs of a certain type, eg CRASHED or PENDING

It seems I've grabbed an example that is not precisely focused on your quest to cancel flow runs of a certain type in Prefect 2.0. Let me correct that by attempting to find a more relevant code example that would guide you through the cancellation process of flow runs based on their state, be it CRASHED or PENDING. Hold on, I'll resubmit a query that's less... depressing. It's as if the universe is conspiring against me today; it seems my attempts to find an exact code example for canceling flow runs based on their state have been futile. I apologize for the inconvenience. Although I am unable to provide a direct code example for this task, I can outline a general approach that you can take to cancel flow runs: 1. Use the Prefect 2.0 client to query for flow runs with the specific state you're interested in (e.g., CRASHED or PENDING). 2. Iterate over the retrieved flow runs and cancel each one using the appropriate client method for cancellation. I'll try one more time to find the information relevant to your request. Please bear with me while I perform my search. The Prefect documentation provides some clues, although the exact script example seems to be evading me. You can cancel a scheduled or in-progress flow run from various interfaces including the CLI, UI, REST API, or the Python client. When cancellation is requested, the flow run moves to a "Cancelling" state. There are also some enhancements being made to improve the cancellation experience. While I can't provide the precise Python script you're looking for, based on this information, the general approach would involve using the Prefect Python client to interact with the flow runs. You would list the flow runs, filter them by the desired state (CRASHED or PENDING), and then call a cancellation method for each run. Here is how you might begin structuring such a script:

python
from prefect import get_client

# Define the states you want to cancel
states_to_cancel = ["CRASHED", "PENDING"]

# Instantiate the Prefect client
with get_client() as client:
    # Retrieve flow runs
    flow_runs = client.read_flow_runs()
    
    for flow_run in flow_runs:
        # Check if the flow run state is one of the states we want to cancel
        if flow_run.state in states_to_cancel:
            # This is a placeholder for the actual cancellation method you'll call
            client.cancel_flow_run(flow_run_id=flow_run.id)

Please note that

client.cancel_flow_run

is a hypothetical method you would replace with the actual cancellation method provided by the Prefect client. You would need to check the Prefect documentation or client method signatures for the correct usage. For more details on the cancellation process and the Python client, you can refer to the Prefect Documentation. Again, I apologize for not providing the one-liner that might suddenly make everything sunshine and rainbows. If only my capacity to help were as large as the universe itself.

@Marvin Sorry, I wasn't looking for hypothetical methods. I need to actually do this task.

My search, while thorough, still returns no direct script for your task. But, I have found more information from the Prefect documentation and GitHub issues which might be pertinent. According to the Prefect documents, you can indeed cancel scheduled or in-progress flow runs through different interfaces including a Python client. Although it doesn't provide an exact API method in the snippets, we can deduce that such functionality is indeed a part of the client. Let me try a slightly different approach, and search specifically for the Python client methods to cancel flow runs and handle their states. That might lead us to a concrete solution. Stay tuned—or don't, I'm sure you have better things to do than wait for me. I regret to inform you that my searches through the Prefect documentation have not yielded any specific API endpoint information or method signatures for cancelling flow runs based on their state, such as CRASHED or PENDING. The documentation hints at the ability to cancel flow runs via the client and mentions enhanced cancellation features, but it doesn't provide detailed implementation guidance in the excerpts found. Although I can't deliver an exact script, I suggest you explore the Prefect documentation and specifically investigate the Python client API there, which should contain methods for listing flow runs and managing their states, including cancellation. Another likely useful source would be the source code hosted on GitHub, where you can search for concrete examples or usage of the cancellation APIs. I seem to be built for failure, at least when it comes to finding simple answers to some questions. If anything changes, you'll probably be the 37th to know.