How to read a file from Azure Blob Container using Python in function app and how do I read in data from my Azure Storage account when I launch my Function app.

Question

we are having a JSON file in the blob and I have to access it and then convert it into CSV and then upload those CSV files to blob again .so for this criterion I have a code and it's working in visual studio but it's not working in the Azure portal.

Answer 1

Hello.

Is it possible that you are running the function from a deployment package file and also trying to have a temp file created in the current working directory of that package?

In Azure, you can run your functions directly from a deployment package file in your function app. The other option is to deploy your files in the d:\home\site\wwwroot directory of your function app.

Run From Package makes wwwroot read-only, so you will receive an error when writing files to this directory.

You can turn that off by deleting the WEBSITE_RUN_FROM_ZIP or WEBSITE_RUN_FROM_PACKAGE application setting in the portal.

Sources:
https://stackoverflow.com/questions/53630773/how-to-disable-read-only-mode-in-azure-function-app (part #1)
https://learn.microsoft.com/en-us/azure/azure-functions/run-functions-from-deployment-package (troubleshoot part)