安装scrapy报错

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    copying src\twisted\internet\iocpreactor\iocpsupport\winsock_pointers.c -> build\lib.win-amd64-3.6\twisted\internet\iocpreactor\iocpsupport

    copying src\twisted\internet\iocpreactor\iocpsupport\winsock_pointers.h -> build\lib.win-amd64-3.6\twisted\internet\iocpreactor\iocpsupport

    copying src\twisted\internet\iocpreactor\iocpsupport\wsarecv.pxi -> build\lib.win-amd64-3.6\twisted\internet\iocpreactor\iocpsupport

    copying src\twisted\internet\iocpreactor\iocpsupport\wsasend.pxi -> build\lib.win-amd64-3.6\twisted\internet\iocpreactor\iocpsupport

    copying src\twisted\internet\test\_awaittests.py.3only -> build\lib.win-amd64-3.6\twisted\internet\test

    copying src\twisted\internet\test\_yieldfromtests.py.3only -> build\lib.win-amd64-3.6\twisted\internet\test

    creating build\lib.win-amd64-3.6\twisted\internet\test\fake_CAs

    copying src\twisted\internet\test\fake_CAs\chain.pem -> build\lib.win-amd64-3.6\twisted\internet\test\fake_CAs

    copying src\twisted\internet\test\fake_CAs\not-a-certificate -> build\lib.win-amd64-3.6\twisted\internet\test\fake_CAs

    copying src\twisted\internet\test\fake_CAs\thing1.pem -> build\lib.win-amd64-3.6\twisted\internet\test\fake_CAs

    copying src\twisted\internet\test\fake_CAs\thing2-duplicate.pem -> build\lib.win-amd64-3.6\twisted\internet\test\fake_CAs

    copying src\twisted\internet\test\fake_CAs\thing2.pem -> build\lib.win-amd64-3.6\twisted\internet\test\fake_CAs

    copying src\twisted\mail\test\rfc822.message -> build\lib.win-amd64-3.6\twisted\mail\test

    copying src\twisted\python\test\_deprecatetests.py.3only -> build\lib.win-amd64-3.6\twisted\python\test

    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.visualstudio.com/visual-cpp-build-tools

    ----------------------------------------

Command "d:\python36\python.exe -u -c "import setuptools, tokenize;__file__='C:\\Users\\xjd_0\\AppData\\Local\\Temp\\pip-install-v3oenju8\\Twisted\\setup.py';f=getattr(tokenize, 'open', open)(__file__);code=f.read().replace('\r\n', '\n');f.close();exec(compile(code, __file__, 'exec'))" install --record C:\Users\xjd_0\AppData\Local\Temp\pip-record-b1fuy076\install-record.txt --single-version-externally-managed --compile" failed with error code 1 in C:\Users\xjd_0\AppData\Local\Temp\pip-install-v3oenju8\Twisted\

 

解决办法：

下载twisted对应版本的whl文件（如我的Twisted-18.4.0-cp36-cp36m-win_amd64.whl），cp后面是python版本，amd64代表64位，运行命令：

pip install  C:\Users\xjd_0\Downloads\Twisted-18.4.0-cp36-cp36m-win_amd64.whl

其中install后面为下载的whl文件的完整路径名

安装完成后，再次运行：

pip install scrapy

即可成功。