module import in custom scripts

[andershagman]

I have a custom script that import modules from a subdirectory.
I got "no module named l3_site" when the script had the name l3_mgmt.py and the module dir was named l3_site.
I changed the dir name to a_l3_site and now it worked.

Must the module dir name have a name before the python file, with the import, in alphabetic order to work?
I haven´t seen anything regarding this anywhere.