Upon importing pythonds3, while learning stacks as part of the course pythonds3,

# Python 3.7.9 (tags/v3.7.9:13c94747c7)

import pythonds3

The following error occured:

Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "./venv/lib/site-packages/pythonds3/__init__.py", line 9, in <module>
    from pythonds3.trees import (
  File "./venv/lib/site-packages/pythonds3/trees/__init__.py", line 7, in <module>
    from pythonds3.trees.binary_heap import BinaryHeap
  File "./venv/lib/site-packages/pythonds3/trees/binary_heap.py", line 13, in <module>
    class BinaryHeap:
  File "./venv/lib/site-packages/pythonds3/trees/binary_heap.py", line 52, in BinaryHeap
    def heapify(self, not_a_heap: list[Any], show_details: bool = False) -> None:
TypeError: 'type' object is not subscriptable

The vertices dict on line 108 has "list" on the value field, while it will only have Vertex objects on it.

Hey, I'm a junior developer, and found an error when importing this library.
In v_3.1.0, it prints:*
Traceback (most recent call last):
File "", line 991, in _find_and_load
File "", line 961, in find_and_load_unlocked
File "", line 219, in call_with_frames_removed
File "D:\Program Files\Python3810\lib\site-packages\pythonds3_init.py", line 9, in
from pythonds3.trees import (
File "D:\Program Files\Python3810\lib\site-packages\pythonds3\trees_init.py", line 7, in
from pythonds3.trees.binary_heap import BinaryHeap
File "D:\Program Files\Python3810\lib\site-packages\pythonds3\trees\binary_heap.py", line 13, in
class BinaryHeap:
File "D:\Program Files\Python3810\lib\site-packages\pythonds3\trees\binary_heap.py", line 52, in BinaryHeap
def heapify(self, not_a_heap: list[Any], show_details: bool = False) -> None:
TypeError: 'type' object is not subscriptabl

But after I change the version to v_3.0.3, it can work well;

Development platform: Windows10+python3.8.10+PycharmPro2022.1