Hi everyone, we just updated from 0.15.4 to 0.15.9 and suddenly our flows are failing on a specific line of code. Every instance of

if status in ['SUCCEEDED', 'FAILED']:

fails with the following error:

TypeError: 'sequence' not supported between instances of 'str' and 'tuple'

If we log the type of string and array, it returns their types correctly.

Hi Maurits, do you have a minimum reproducible example that works with 0.15.4 and fails with 0.15.9?

Hi Jake, Well, a test was working locally on my pc, so I looked at the differences with the ECS Agent and it seems the Python-version was the problem. Locally I was running 3.8 and the ECS task used the prefecthq/prefect:0.15.9-python3.9 image. After changing this to the python3.8 tag, it was working again.

I am not sure off of the top of my head a change between python3.8 and 3.9 that would cause this type of error (prefect should support both). I'll try to see if I can find something. I'm glad you were able to resolve your issue for now!

Yeah, it’s kinda strange, because I updated locally as well, to test this issue. Locally it’s still working as expected, no sudden errors