error: Microsoft Visual C++ 14.0 is required. Get it with "Microsoft Visual C++ Build Tools"

運行環境：
WIN10
python版本：3.6.5

經常使用linux的我，今天突然有需求使用win做一個小小的爬蟲項目，但是在安裝scrapy時出現了缺少C++庫的報錯。具體報錯如下：

    building 'twisted.test.raiser' extension
    error: Microsoft Visual C++ 14.0 is required. Get it with "Microsoft Visual C++ Build Tools":
 http://landinghub.visualstudio.com/visual-cpp-build-tools

提示內容大概是需要安裝一個C++14.0的一個庫，但是經過嘗試鏈接卻打不開。據有經驗的大佬說是庫文件非常之大，安裝非常麻煩，遂到網上一番衝浪，尋到了一個更簡單的安裝集成包的方法可以跳過這個庫的安裝：
集成包下載地址：
https://www.lfd.uci.edu/~gohlke/pythonlibs/#twisted

解決步驟：
1.首先打開https://www.lfd.uci.edu/~gohlke/pythonlibs/#twisted，找到對應版本的Twisted並下載到你的文件夾。在此我用的對應版本是：
Twisted-18.9.0-cp36-cp36m-win_amd64.whl

2.利用pip install命令安裝指定存儲路徑下的whl文件。

pip install Twisted-18.9.0-cp36-cp36m-win_amd64.whl

一羣代碼狂奔而過之後結果如下 表示已經安裝完成

D:\>pip install Twisted-18.9.0-cp36-cp36m-win_amd64.whl
Processing d:\twisted-18.9.0-cp36-cp36m-win_amd64.whl
Requirement already satisfied: Automat>=0.3.0 in c:\program files\python36\lib\site-packages (fro
m Twisted==18.9.0) (0.7.0)
Requirement already satisfied: hyperlink>=17.1.1 in c:\program files\python36\lib\site-packages (
from Twisted==18.9.0) (18.0.0)
Requirement already satisfied: PyHamcrest>=1.9.0 in c:\program files\python36\lib\site-packages (
from Twisted==18.9.0) (1.9.0)
Requirement already satisfied: incremental>=16.10.1 in c:\program files\python36\lib\site-package
s (from Twisted==18.9.0) (17.5.0)
Requirement already satisfied: attrs>=17.4.0 in c:\program files\python36\lib\site-packages (from
 Twisted==18.9.0) (18.2.0)
Requirement already satisfied: constantly>=15.1 in c:\program files\python36\lib\site-packages (f
rom Twisted==18.9.0) (15.1.0)
Requirement already satisfied: zope.interface>=4.4.2 in c:\program files\python36\lib\site-packag
es (from Twisted==18.9.0) (4.6.0)
Requirement already satisfied: six in c:\program files\python36\lib\site-packages (from Automat>=
0.3.0->Twisted==18.9.0) (1.11.0)
Requirement already satisfied: idna>=2.5 in c:\program files\python36\lib\site-packages (from hyp
erlink>=17.1.1->Twisted==18.9.0) (2.7)
Requirement already satisfied: setuptools in c:\program files\python36\lib\site-packages (from Py
Hamcrest>=1.9.0->Twisted==18.9.0) (28.8.0)
Installing collected packages: Twisted
Successfully installed Twisted-18.9.0

3.利用pip install 命令繼續安裝Scrapy

pip install scrapy

隨後又是一羣代碼狂奔而過。代碼過多就不復制粘貼了，但是，最後一行代碼如下：表示安裝scrapy成功

Successfully installed scrapy-1.5.1

然後完美解決問題。