无法访问Jupiter笔记本,Jsonschema丢失

过去一天,我一直在用我的macbookair解决问题,不幸的是,我又碰到了更多的问题。你可能以前见过这个问题,但我在尝试了所有答案后,无法解决这个问题

Can't use Jupyter Notebook: jsonschema apparently missing

Traceback (most recent call last):
  File "/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/site-packages/nbformat/validator.py", line 12, in <module>
    from jsonschema import ValidationError
  File "/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/site-packages/jsonschema/__init__.py", line 32, in <module>
    from pkg_resources import get_distribution
ImportError: cannot import name 'get_distribution'

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/Library/Frameworks/Python.framework/Versions/3.6/bin/jupyter-notebook", line 6, in <module>
    from notebook.notebookapp import main
  File "/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/site-packages/notebook/notebookapp.py", line 83, in <module>
    from .services.contents.manager import ContentsManager
  File "/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/site-packages/notebook/services/contents/manager.py", line 17, in <module>
    from nbformat import sign, validate as validate_nb, ValidationError
  File "/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/site-packages/nbformat/__init__.py", line 33, in <module>
    from .validator import validate, ValidationError
  File "/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/site-packages/nbformat/validator.py", line 23, in <module>
    raise ImportError(str(e) + verbose_msg)
ImportError: cannot import name 'get_distribution'

    Jupyter notebook format depends on the jsonschema package:

        https://pypi.python.org/pypi/jsonschema

    Please install it first.

我使用的是: 马科斯高地塞拉10.13.6 Macbook Air 2011 i7 4gb内存 python3.6.0(pip3安装Jupyter) 我在Python中安装了什么:Numpy、Pandas、Tensorflow、Keras

谢谢你的帮助!如果可能的话,请指出任何错误或我可以改进这个问题的方法。另外,试着用不同于