Python Script and import Bluetooth

Hello, I am trying to use the python scripts of home assistant from my hassbian but I am stuck into the following problem:
I have a python program that can turn on/off a bluetooth bulb (CHSmart Bulb). When I run it as stand alone it works, so now I wanted to implement it in my Home Assistant as python script. The problem is that I need to import the bluetooth python module in order to connect and control the bulb, and apparently the import is not supported by python scripts, as I get the following error:

2019-08-08 14:53:42 ERROR (SyncWorker_0) [homeassistant.components.python_script.test.py] Error executing script: __import__ not found
Traceback (most recent call last):
  File "/srv/homeassistant/lib/python3.7/site-packages/homeassistant/components/python_script/__init__.py", line 182, in execute
    exec(compiled.code, restricted_globals, local)
  File "test.py", line 1, in <module>
ImportError: __import__ not found

What do I do wrong? And how can I control the bulb then?
Thank you in advance

python_script is very restricted. import, among many other things, is not supported. You’ll need to use a command_line script to run this code.

Yes I realised that. I am adapting my code so that I can start the script with a parameter “on” that i read as mode = sys.argv[1] and then according to this I go through CaseA or CaseB. Pity, I liked the solution through the PythonScripts…