<@ULVA73B9P> when I deploy Deployments via CLI wit...
# ask-marvin
o
@Marvin when I deploy Deployments via CLI with
prefect deploy
, the deployments seem to happen in an async context. Some static code I have in the files containing the flows complains about expecting a type, but getting coroutine as a type. Can I deploy using a synchronous context?
m
The issue you're experiencing with Prefect deployments using an asynchronous context is a known aspect of Prefect 3.x. The deployment process inherently involves asynchronous operations, as Prefect uses asynchronous clients and context managers. This can lead to type errors if your static code analysis expects synchronous types but encounters coroutines. Here's what you can do to address this issue: 1. Use
sync_compatible
Decorator
: Prefect provides a
sync_compatible
decorator, which allows you to run asynchronous functions in a synchronous manner. This might help if you need to ensure certain parts of your code execute synchronously. However, this would need to be applied to functions you control. 2. Refactor Static Code: If possible, refactor the static code that relies on synchronous execution to handle coroutines. This might involve using
asyncio.run()
or similar constructs to ensure that coroutines are awaited properly. 3. Handle Coroutines Properly: Ensure that any coroutine returned by Prefect's API is awaited. This can be done by wrapping the coroutine calls within an
async
function and using
await
. 4. Check for Known Issues: There are known issues related to async deployments. For example, some users have encountered errors when deploying async functions, which can be found in Prefect GitHub issues. Reviewing these might provide additional context or solutions. For more information, you can explore the Prefect documentation on asynchronous operations and flow deployment. If you continue to face issues, consider posting detailed error logs and code snippets in the Prefect community forums for more targeted assistance.