How to add custom python module to Python datasource


I have a custom python script I want to use. I have Redash 7 running on a docker container. The module is copy to the server container and the path is added to “AdditionalModulesPaths” when I create the python datasource. However I cannot import the module.
I got this error

’redash_utils’ is not configured as a supported import module

Can anyone help me solve this.