cannot import name 'Sequence' from 'collections'

This error message usually occurs when trying to import the `Sequence` class from the `collections` module in Python 3.8 or earlier versions, where the `Sequence` class was not yet defined. The `Sequence` class was only introduced in Python 3.9.

If you're using Python 3.8 or earlier and need to use the `Sequence` class, you can try installing the `typing` module and importing `Sequence` from there:

from typing import Sequence

Alternatively, you can consider upgrading to Python 3.9 or later to use the `Sequence` class directly.