pip install jupyter：「無法找到'pip._vendor.distlib'的查找程序」「

我試圖安裝jupyter以在Windows下使用IPython Notebook。但是，如果我跑pip install jupyter我得到pip install jupyter：「無法找到'pip._vendor.distlib'的查找程序」「

Using cached pyzmq-15.4.0.zip 
Requirement already satisfied (use --upgrade to upgrade): wcwidth in c:\users\stefan\appdata\local\programs\python\python36\lib\site-packages (from prompt-toolkit<2.0.0,>=1.0.0->jupyter-console->jupyter) 
Installing collected packages: nbformat, nbconvert, pyzmq, jupyter-client, tornado, ipykernel, notebook, widgetsnbextension, ipywidgets, qtconsole, jupyter-console, jupyter 
Exception: 
Traceback (most recent call last): 
    File "C:\Users\Stefan\AppData\Local\Programs\Python\Python36\lib\site-packages\pip\basecommand.py", line 215, in main 
    status = self.run(options, args) 
    File "C:\Users\Stefan\AppData\Local\Programs\Python\Python36\lib\site-packages\pip\commands\install.py", line 317, in run 
    prefix=options.prefix_path, 
    File "C:\Users\Stefan\AppData\Local\Programs\Python\Python36\lib\site-packages\pip\req\req_set.py", line 742, in install 
    **kwargs 
    File "C:\Users\Stefan\AppData\Local\Programs\Python\Python36\lib\site-packages\pip\req\req_install.py", line 831, in install 
    self.move_wheel_files(self.source_dir, root=root, prefix=prefix) 
    File "C:\Users\Stefan\AppData\Local\Programs\Python\Python36\lib\site-packages\pip\req\req_install.py", line 1032, in move_wheel_files 
    isolated=self.isolated, 
    File "C:\Users\Stefan\AppData\Local\Programs\Python\Python36\lib\site-packages\pip\wheel.py", line 493, in move_wheel_files 
    maker.make_multiple(['%s = %s' % kv for kv in console.items()]) 
    File "C:\Users\Stefan\AppData\Local\Programs\Python\Python36\lib\site-packages\pip\_vendor\distlib\scripts.py", line 383, in make_multiple 
    filenames.extend(self.make(specification, options)) 
    File "C:\Users\Stefan\AppData\Local\Programs\Python\Python36\lib\site-packages\pip\_vendor\distlib\scripts.py", line 372, in make 
    self._make_script(entry, filenames, options=options) 
    File "C:\Users\Stefan\AppData\Local\Programs\Python\Python36\lib\site-packages\pip\_vendor\distlib\scripts.py", line 276, in _make_script 
    self._write_script(scriptnames, shebang, script, filenames, ext) 
    File "C:\Users\Stefan\AppData\Local\Programs\Python\Python36\lib\site-packages\pip\_vendor\distlib\scripts.py", line 212, in _write_script 
    launcher = self._get_launcher('t') 
    File "C:\Users\Stefan\AppData\Local\Programs\Python\Python36\lib\site-packages\pip\_vendor\distlib\scripts.py", line 351, in _get_launcher 
    result = finder(distlib_package).find(name).bytes 
    File "C:\Users\Stefan\AppData\Local\Programs\Python\Python36\lib\site-packages\pip\_vendor\distlib\resources.py", line 324, in finder 
    raise DistlibException('Unable to locate finder for %r' % package) 
pip._vendor.distlib.DistlibException: Unable to locate finder for 'pip._vendor.distlib'

任何想法，這裏的問題是什麼？

來源

2016-09-17 displayname