利用 pip install scrapy 安裝scrapy時
出現的錯誤：

 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'

上 stack overflow 查了下 ，說是python3.6的一個bug，原來用的3.6.0，因為各種bug，重灌了3.6.2，但是安裝時發現Twisted安裝不上，需要單獨安裝。
解決辦法：
從 http://www.lfd.uci.edu/~gohlke/pythonlibs/#scipy 下載對應版本的Twisted

然後放到Python安裝目錄下的Script目錄下，然後在cmd裡將目錄切換到Script目錄，執行pip install Twisted‑17.5.0‑cp36‑cp36m‑win_amd64.whl 即可。

然後再次執行pip install scrapy 等待再次安裝完成~
此時輸入 scrapy -h，如果出現以下情況，就證明scrapy已經安裝成功