[kruprecht]

I'm tryin to use Calibre in a Python Telegram bot and have already included calibre.utils.icu in this manner

from calibre.utils.icu import sort_key

But I'm getting this error:

Traceback (most recent call last):
File "c:\dev\Python\calibre-connect.py", line 21, in <module>
from calibre.utils.icu import sort_key
File "C:\Program Files\Calibre2\calibre\src\calibre\__init__.py", line 19, in <module>
from calibre.constants import (iswindows, ismacos, islinux, isfrozen,
File "C:\Program Files\Calibre2\calibre\src\calibre\constants.py", line 168, in <module>
plugins_loc = sys.extensions_location
AttributeError: module 'sys' has no attribute 'extensions_location'

Any ideas?
THX