pip遇到error: Microsoft Visual C++ 14.0 is required正确解决方式_pip错误“microsoft visual c++ 14.0 is required.”

1.环境:

• win7系统
• python3.6 64位版本

2.当我pip install scrapy时遇到错误:

copying src\twisted\words\im\instancemessenger.glade -> build\lib.win-amd64-3.6\twisted\words\im
    copying src\twisted\words\xish\xpathparser.g -> build\lib.win-amd64-3.6\twisted\words\xish
    running build_ext
    building 'twisted.test.raiser' extension
    error: Microsoft Visual C++ 14.0 is required. Get it with "Microsoft Visual C++ Build Tools": http://landinghub.visualstudi
o.com/visual-cpp-build-tools

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相信很多人看见error: Microsoft Visual C++ 14.0 is required. Get it with “Microsoft Visual C++ Build Tools”: http://landinghub.visualstudi
o.com/visual-cpp-build-tools这个错误,会直接傻乎乎的去下载Microsoft Visual C++ 14.0,结果下完并没有什么卵用.
我们来看下erro上面的信息,好像都跟twisted相关.
我们到pypi官网搜索一下twisted

Filename, size & hash SHA256 hash help	File type	Python version	Upload date
Twisted-19.2.0-cp27-cp27m-win_amd64.whl (3.2 MB)  Copy SHA256 hash SHA256	Wheel	cp27	Apr 10, 2019
Twisted-19.2.0.tar.bz2 (3.1 MB)  Copy SHA256 hash SHA256	Source	None	Apr 10, 2019
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由此可以看出pypi并没有3.6版本的Twisted只有2.7的

3.解决方法:

1. 可以自己去下载Twisted(whl格式的)
   网址:https://www.lfd.uci.edu/~gohlke/pythonlibs/#twisted
   下载下来后,pip install 下载的文件

 F:\project\103.208.34.199_scrapy>pip install Twisted-19.2.0-cp36-cp36m-win_amd64.whl
Processing f:\project\103.208.34.199_scrapy\twisted-19.2.0-cp36-cp36m-win_amd64.whl
Requirement already satisfied: hyperlink>=17.1.1 in f:\project\103.208.34.199_scrapy\venv\lib\site-packages (from Twisted==19.2
.0) (19.0.0)
Requirement already satisfied: constantly>=15.1 in f:\project\103.208.34.199_scrapy\venv\lib\site-packages (from Twisted==19.2.
0) (15.1.0)
Requirement already satisfied: PyHamcrest>=1.9.0 in f:\project\103.208.34.199_scrapy\venv\lib\site-packages (from Twisted==19.2
.0) (1.9.0)
Requirement already satisfied: attrs>=17.4.0 in f:\project\103.208.34.199_scrapy\venv\lib\site-packages (from Twisted==19.2.0)
(19.1.0)
Requirement already satisfied: Automat>=0.3.0 in f:\project\103.208.34.199_scrapy\venv\lib\site-packages (from Twisted==19.2.0)
 (0.7.0)
Requirement already satisfied: incremental>=16.10.1 in f:\project\103.208.34.199_scrapy\venv\lib\site-packages (from Twisted==1
9.2.0) (17.5.0)
Requirement already satisfied: zope.interface>=4.4.2 in f:\project\103.208.34.199_scrapy\venv\lib\site-packages (from Twisted==
19.2.0) (4.6.0)
Requirement already satisfied: idna>=2.5 in f:\project\103.208.34.199_scrapy\venv\lib\site-packages (from hyperlink>=17.1.1->Tw
isted==19.2.0) (2.8)
Requirement already satisfied: six in f:\project\103.208.34.199_scrapy\venv\lib\site-packages (from PyHamcrest>=1.9.0->Twisted=
=19.2.0) (1.12.0)
Requirement already satisfied: setuptools in f:\project\103.208.34.199_scrapy\venv\lib\site-packages\setuptools-39.1.0-py3.6.eg
g (from PyHamcrest>=1.9.0->Twisted==19.2.0) (39.1.0)
Installing collected packages: Twisted
Successfully installed Twisted-19.2.0

(venv) F:\project\103.208.34.199_scrapy>pip install scrapy
Collecting scrapy
  Using cached https://files.pythonhosted.org/packages/3e/45/414e87ac8209d537c91575538c5307c20217a6943f555e0ee39f6db4bb0f/Scrap
y-1.6.0-py2.py3-none-any.whl
Requirement already satisfied: Twisted>=13.1.0 in f:\project\103.208.34.199_scrapy\venv\lib\site-packages (from scrapy) (19.2.0
)
Requirement already satisfied: lxml in f:\project\103.208.34.199_scrapy\venv\lib\site-packages (from scrapy) (4.3.3)
Requirement already satisfied: service-identity in f:\project\103.208.34.199_scrapy\venv\lib\site-packages (from scrapy) (18.1.
0)
Requirement already satisfied: w3lib>=1.17.0 in f:\project\103.208.34.199_scrapy\venv\lib\site-packages (from scrapy) (1.20.0)
Requirement already satisfied: PyDispatcher>=2.0.5 in f:\project\103.208.34.199_scrapy\venv\lib\site-packages (from scrapy) (2.
0.5)
Requirement already satisfied: six>=1.5.2 in f:\project\103.208.34.199_scrapy\venv\lib\site-packages (from scrapy) (1.12.0)
Requirement already satisfied: cssselect>=0.9 in f:\project\103.208.34.199_scrapy\venv\lib\site-packages (from scrapy) (1.0.3)
Requirement already satisfied: queuelib in f:\project\103.208.34.199_scrapy\venv\lib\site-packages (from scrapy) (1.5.0)
Requirement already satisfied: parsel>=1.5 in f:\project\103.208.34.199_scrapy\venv\lib\site-packages (from scrapy) (1.5.1)
Requirement already satisfied: pyOpenSSL in f:\project\103.208.34.199_scrapy\venv\lib\site-packages (from scrapy) (19.0.0)
Requirement already satisfied: hyperlink>=17.1.1 in f:\project\103.208.34.199_scrapy\venv\lib\site-packages (from Twisted>=13.1
.0->scrapy) (19.0.0)
Requirement already satisfied: PyHamcrest>=1.9.0 in f:\project\103.208.34.199_scrapy\venv\lib\site-packages (from Twisted>=13.1
.0->scrapy) (1.9.0)
Requirement already satisfied: zope.interface>=4.4.2 in f:\project\103.208.34.199_scrapy\venv\lib\site-packages (from Twisted>=
13.1.0->scrapy) (4.6.0)
Requirement already satisfied: constantly>=15.1 in f:\project\103.208.34.199_scrapy\venv\lib\site-packages (from Twisted>=13.1.
0->scrapy) (15.1.0)
Requirement already satisfied: attrs>=17.4.0 in f:\project\103.208.34.199_scrapy\venv\lib\site-packages (from Twisted>=13.1.0->
scrapy) (19.1.0)
Requirement already satisfied: incremental>=16.10.1 in f:\project\103.208.34.199_scrapy\venv\lib\site-packages (from Twisted>=1
3.1.0->scrapy) (17.5.0)
Requirement already satisfied: Automat>=0.3.0 in f:\project\103.208.34.199_scrapy\venv\lib\site-packages (from Twisted>=13.1.0-
>scrapy) (0.7.0)
Requirement already satisfied: pyasn1-modules in f:\project\103.208.34.199_scrapy\venv\lib\site-packages (from service-identity
->scrapy) (0.2.5)
Requirement already satisfied: pyasn1 in f:\project\103.208.34.199_scrapy\venv\lib\site-packages (from service-identity->scrapy
) (0.4.5)
Requirement already satisfied: cryptography in f:\project\103.208.34.199_scrapy\venv\lib\site-packages (from service-identity->
scrapy) (2.6.1)
Requirement already satisfied: idna>=2.5 in f:\project\103.208.34.199_scrapy\venv\lib\site-packages (from hyperlink>=17.1.1->Tw
isted>=13.1.0->scrapy) (2.8)
Requirement already satisfied: setuptools in f:\project\103.208.34.199_scrapy\venv\lib\site-packages\setuptools-39.1.0-py3.6.eg
g (from PyHamcrest>=1.9.0->Twisted>=13.1.0->scrapy) (39.1.0)
Requirement already satisfied: asn1crypto>=0.21.0 in f:\project\103.208.34.199_scrapy\venv\lib\site-packages (from cryptography
->service-identity->scrapy) (0.24.0)
Requirement already satisfied: cffi!=1.11.3,>=1.8 in f:\project\103.208.34.199_scrapy\venv\lib\site-packages (from cryptography
->service-identity->scrapy) (1.12.3)
Requirement already satisfied: pycparser in f:\project\103.208.34.199_scrapy\venv\lib\site-packages (from cffi!=1.11.3,>=1.8->c
ryptography->service-identity->scrapy) (2.19)
Installing collected packages: scrapy
Successfully installed scrapy-1.6.0

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安装成功
2. 再pip install scrapy

F:\project\103.208.34.199_scrapy>pip install scrapy
Collecting scrapy
 Using cached https://files.pythonhosted.org/packages/3e/45/414e87ac8209d537c91575538c5307c20217a6943f555e0ee39f6db4bb0f/Scrap
y-1.6.0-py2.py3-none-any.whl
Requirement already satisfied: Twisted>=13.1.0 in f:\project\103.208.34.199_scrapy\venv\lib\site-packages (from scrapy) (19.2.0
)
Requirement already satisfied: lxml in f:\project\103.208.34.199_scrapy\venv\lib\site-packages (from scrapy) (4.3.3)
Requirement already satisfied: service-identity in f:\project\103.208.34.199_scrapy\venv\lib\site-packages (from scrapy) (18.1.
0)
Requirement already satisfied: w3lib>=1.17.0 in f:\project\103.208.34.199_scrapy\venv\lib\site-packages (from scrapy) (1.20.0)
Requirement already satisfied: PyDispatcher>=2.0.5 in f:\project\103.208.34.199_scrapy\venv\lib\site-packages (from scrapy) (2.
0.5)
Requirement already satisfied: six>=1.5.2 in f:\project\103.208.34.199_scrapy\venv\lib\site-packages (from scrapy) (1.12.0)
Requirement already satisfied: cssselect>=0.9 in f:\project\103.208.34.199_scrapy\venv\lib\site-packages (from scrapy) (1.0.3)
Requirement already satisfied: queuelib in f:\project\103.208.34.199_scrapy\venv\lib\site-packages (from scrapy) (1.5.0)
Requirement already satisfied: parsel>=1.5 in f:\project\103.208.34.199_scrapy\venv\lib\site-packages (from scrapy) (1.5.1)
Requirement already satisfied: pyOpenSSL in f:\project\103.208.34.199_scrapy\venv\lib\site-packages (from scrapy) (19.0.0)
Requirement already satisfied: hyperlink>=17.1.1 in f:\project\103.208.34.199_scrapy\venv\lib\site-packages (from Twisted>=13.1
.0->scrapy) (19.0.0)
Requirement already satisfied: PyHamcrest>=1.9.0 in f:\project\103.208.34.199_scrapy\venv\lib\site-packages (from Twisted>=13.1
.0->scrapy) (1.9.0)
Requirement already satisfied: zope.interface>=4.4.2 in f:\project\103.208.34.199_scrapy\venv\lib\site-packages (from Twisted>=
13.1.0->scrapy) (4.6.0)
Requirement already satisfied: constantly>=15.1 in f:\project\103.208.34.199_scrapy\venv\lib\site-packages (from Twisted>=13.1.
0->scrapy) (15.1.0)
Requirement already satisfied: attrs>=17.4.0 in f:\project\103.208.34.199_scrapy\venv\lib\site-packages (from Twisted>=13.1.0->
scrapy) (19.1.0)
Requirement already satisfied: incremental>=16.10.1 in f:\project\103.208.34.199_scrapy\venv\lib\site-packages (from Twisted>=1
3.1.0->scrapy) (17.5.0)
Requirement already satisfied: Automat>=0.3.0 in f:\project\103.208.34.199_scrapy\venv\lib\site-packages (from Twisted>=13.1.0-
>scrapy) (0.7.0)
Requirement already satisfied: pyasn1-modules in f:\project\103.208.34.199_scrapy\venv\lib\site-packages (from service-identity
->scrapy) (0.2.5)
Requirement already satisfied: pyasn1 in f:\project\103.208.34.199_scrapy\venv\lib\site-packages (from service-identity->scrapy
) (0.4.5)
Requirement already satisfied: cryptography in f:\project\103.208.34.199_scrapy\venv\lib\site-packages (from service-identity->
scrapy) (2.6.1)
Requirement already satisfied: idna>=2.5 in f:\project\103.208.34.199_scrapy\venv\lib\site-packages (from hyperlink>=17.1.1->Tw
isted>=13.1.0->scrapy) (2.8)
Requirement already satisfied: setuptools in f:\project\103.208.34.199_scrapy\venv\lib\site-packages\setuptools-39.1.0-py3.6.eg
g (from PyHamcrest>=1.9.0->Twisted>=13.1.0->scrapy) (39.1.0)
Requirement already satisfied: asn1crypto>=0.21.0 in f:\project\103.208.34.199_scrapy\venv\lib\site-packages (from cryptography
->service-identity->scrapy) (0.24.0)
Requirement already satisfied: cffi!=1.11.3,>=1.8 in f:\project\103.208.34.199_scrapy\venv\lib\site-packages (from cryptography
->service-identity->scrapy) (1.12.3)
Requirement already satisfied: pycparser in f:\project\103.208.34.199_scrapy\venv\lib\site-packages (from cffi!=1.11.3,>=1.8->c
ryptography->service-identity->scrapy) (2.19)
Installing collected packages: scrapy
Successfully installed scrapy-1.6.0

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很开心没有报错了