How to convert a VDI file into a Virtual Machine using python and pyvbox

I want to create a python script that receives a VDI file as an argument and converts it to a virtual machine.
For example I want to be able to do this:

python build_VDI.py -f C:\images\centos7.vdi

The script build_VDI.py should convert the VDI file into a virtual machine.
I am trying to use pyvbox to accomplish this task but I don't know how to start.
How do i accomplish this?

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