Traceback (most recent call last):


 "/usr/local/bin/bukuserver", line 7, in <module>

from bukuserver.server import cli


 "/usr/local/lib/python3.5/dist-packages/bukuserver/server.py", line 8, in <module>

from buku import BukuDb, __version__, network_handler


 "/usr/local/lib/python3.5/dist-packages/buku.py", line 21, in <module>

from bs4 import BeautifulSoup


 "/usr/lib/python3/dist-packages/bs4/__init__.py", line 30, in <module>

from .builder import builder_registry, ParserRejectedMarkup


 "/usr/lib/python3/dist-packages/bs4/builder/__init__.py", line 314, in <module>

from . import _html5lib


 "/usr/lib/python3/dist-packages/bs4/builder/_html5lib.py", line 70, in <module>

class TreeBuilderForHtml5lib(html5lib.treebuilders._base.TreeBuilder):
AttributeError: module 'html5lib.treebuilders' has no attribute '_base'

```Traceback (most recent call last):


 "<frozen importlib._bootstrap>", line 983, in _find_and_load


 "<frozen importlib._bootstrap>", line 967, in _find_and_load_unlocked


 "<frozen importlib._bootstrap>", line 677, in _load_unlocked


 "<frozen importlib._bootstrap_external>", line 728, in exec_module


 "<frozen importlib._bootstrap>", line 219, in _call_with_frames_removed


 "/Library/Frameworks/Python.framework/Versions/3.7/lib/python3.7/site-packages/pydicom/__init__.py", line 32, in <module>

from pydicom.dataelem import DataElement


 "/Library/Frameworks/Python.framework/Versions/3.7/lib/python3.7/site-packages/pydicom/dataelem.py", line 16, in <module>

from pydicom import config
# don't import datetime_conversion directly


 "/Library/Frameworks/Python.framework/Versions/3.7/lib/python3.7/site-packages/pydicom/config.py", line 103, in <module>

import pydicom.overlay_data_handlers.numpy_handler as overlay_np
# noqa


 "/Library/Frameworks/Python.framework/Versions/3.7/lib/python3.7/site-packages/pydicom/overlay_data_handlers/numpy_handler.py", line 47, in <module>

from pydicom.pixel_data_handlers.numpy_handler import unpack_bits


 "/Library/Frameworks/Python.framework/Versions/3.7/lib/python3.7/site-packages/pydicom/pixel_data_handlers/numpy_handler.py", line 52, in <module>

import numpy as np


 "/Library/Frameworks/Python.framework/Versions/3.7/lib/python3.7/site-packages/numpy/__init__.py", line 152, in <module>

from . import random


 "/Library/Frameworks/Python.framework/Versions/3.7/lib/python3.7/site-packages/numpy/random/__init__.py", line 181, in <module>

from . import _pickle


 "/Library/Frameworks/Python.framework/Versions/3.7/lib/python3.7/site-packages/numpy/random/_pickle.py", line 1, in <module>

from .mtrand import RandomState


 "_bit_generator.pxd", line 14, in init numpy.random.mtrand


 "_bit_generator.pyx", line 255, in init numpy.random._bit_generator
AttributeError: type object 'numpy.random._bit_generator.SeedSequence' has no attribute '__reduce_cython__'
