[Python] Where can I get the Python 2to3 library on Buildroot

I get the following error when importing gmusicapi in Python 2.7 on a Buildroot Linux system:

>>> import gmusicapi
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "gmusicapi/__init__.py", line 4, in <module>
from gmusicapi.clients import Webclient, Musicmanager, Mobileclient
File "gmusicapi/clients/__init__.py", line 4, in <module>
from gmusicapi.clients.webclient import Webclient
File "gmusicapi/clients/webclient.py", line 5, in <module>
from past.builtins import basestring
File "past/__init__.py", line 88, in <module>
from past.translation import install_hooks as autotranslate
File "past/translation/__init__.py", line 41, in <module>
from lib2to3.pgen2.parse import ParseError
ImportError: No module named lib2to3.pgen2.parse


Python can't find lib2to3. Neither can I ;-). Is there anywhere I can download this library? I'm using Buildroot, so I can't simply do pip installs.

This is not a duplicate of: How to use/install python 2to3?

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