Hi, trying out Prefect cloud, I have a Python script that saves a png file using Matplotlib The method

plt.savefig

takes in a

file_path

arg (below is some sample code):

CWD = os.path.dirname(os.path.abspath(__file__)) # Get CWD
file_path = os.path.join(CWD, "picture.png") # Save in CWD
plt.savefig(file_path)

This all works fine when I am running it on my server using

flow.run()

, however, when it is registered on cloud, invoking a Quick Run results in the error :

PermissionError: [Errno 13] Permission denied: '/picture.png'

The error shows that

file_path

is unable to be parsed to the current working directory that the script is being run from when triggered from Cloud. Would appreciate any insight.. if it helps, I am getting data from Google Sheets, plotting it and sending it to Slack, so I'd like to Prefect this workflow.

It sounds like when you're running your flow locally, you're doing so with elevated permission (maybe

sudo

or as a user with access to that file?) but perhaps your agent/executor don't have those same permissions?

This doesn't get parsed when called from Prefect cloud ( but gets parsed when run locally via

flow.run()

, from within

@task

):

os.path.dirname(os.path.abspath(__file__))

So the path resolves to just

/'file_name'

. Writing to the root folder

/

is not allowed, hence

PermissionError: [Errno 13]

. The error is resolved when CWD gets called outside of

@task