import_obj.py

import bpy
import sys

if __name__ == "__main__":

    # Get object file path from 1st argument after "--".
    # Get png file path from 2nd argument after "--".
    argv = sys.argv
    argv = argv[argv.index("--") + 1:] # get all args after "--"
    obj_file = argv[0]
    png_file = argv[1]

    # Remove cube object that is added in default
    bpy.data.objects.remove(bpy.data.objects['Cube'])

    # Import object file
    bpy.ops.import_scene.obj(filepath=obj_file)

    # Export rendered image to png file
    bpy.ops.render.render()
    bpy.data.images['Render Result'].save_render(filepath = png_file)

    # Quit Blender
    bpy.ops.wm.quit_blender()