centos7
python2.7
安装完pip后
执行命令创建项目：
scrapy startproject todayMovie
结果报错了，如下：
[root@lhy-v7-21 scrapycrawler]# scrapy startproject todayMovie Traceback (most recent call last): File "/usr/bin/scrapy", line 7, in <module> from scrapy.cmdline import execute File "/usr/lib64/python2.7/site-packages/scrapy/cmdline.py", line 9, in <module> from scrapy.crawler import CrawlerProcess File "/usr/lib64/python2.7/site-packages/scrapy/crawler.py", line 7, in <module> from twisted.internet import reactor, defer File "/usr/lib64/python2.7/site-packages/twisted/internet/reactor.py", line 38, in <module> from twisted.internet import default File "/usr/lib64/python2.7/site-packages/twisted/internet/default.py", line 56, in <module> install = _getInstallFunction(platform) File "/usr/lib64/python2.7/site-packages/twisted/internet/default.py", line 44, in _getInstallFunction from twisted.internet.epollreactor import install File "/usr/lib64/python2.7/site-packages/twisted/internet/epollreactor.py", line 24, in <module> from twisted.internet import posixbase File "/usr/lib64/python2.7/site-packages/twisted/internet/posixbase.py", line 18, in <module> from twisted.internet import error, udp, tcp File "/usr/lib64/python2.7/site-packages/twisted/internet/tcp.py", line 28, in <module> from twisted.internet._newtls import ( File "/usr/lib64/python2.7/site-packages/twisted/internet/_newtls.py", line 21, in <module> from twisted.protocols.tls import TLSMemoryBIOFactory, TLSMemoryBIOProtocol File "/usr/lib64/python2.7/site-packages/twisted/protocols/tls.py", line 63, in <module> from twisted.internet._sslverify import _setAcceptableProtocols File "/usr/lib64/python2.7/site-packages/twisted/internet/_sslverify.py", line 38, in <module> TLSVersion.TLSv1_1: SSL.OP_NO_TLSv1_1, AttributeError: 'module' object has no attribute 'OP_NO_TLSv1_1'
后面搜索问题，网上提供了各种各样的解决方案。比如我近照网上说的安装了如下：
yum install python-devel <span style="color:#3f3f3f">pip install pyopenssl –upgrade</span>
也没有用，后面升级更新系统和pip也没用
后面就安装了这个版本，
twisted，网上说不能安装太高的版本，可以先查看scrapy需要怎么样的版本再安装怎么样的版本。如： [root@lhy-v7-21 scrapycrawler]# pip install scrapy Requirement already satisfied: scrapy in /usr/lib64/python2.7/site-packages Requirement already satisfied: pyOpenSSL in /usr/lib64/python2.7/site-packages (from scrapy) Requirement already satisfied: parsel>=1.1 in /usr/lib/python2.7/site-packages (from scrapy) Requirement already satisfied: six>=1.5.2 in /usr/lib/python2.7/site-packages (from scrapy) Requirement already satisfied: queuelib in /usr/lib/python2.7/site-packages (from scrapy) Requirement already satisfied: Twisted>=13.1.0 in /usr/lib64/python2.7/site-packages (from scrapy) Requirement already satisfied: PyDispatcher>=2.0.5 in /usr/lib/python2.7/site-packages (from scrapy) Requirement already satisfied: lxml in /usr/lib64/python2.7/site-packages (from scrapy) Requirement already satisfied: w3lib>=1.17.0 in /usr/lib/python2.7/site-packages (from scrapy) Requirement already satisfied: cssselect>=0.9 in /usr/lib/python2.7/site-packages (from scrapy) Requirement already satisfied: service-identity in /usr/lib/python2.7/site-packages (from scrapy) Requirement already satisfied: zope.interface>=3.6.0 in /usr/lib64/python2.7/site-packages (from Twisted>=13.1.0->scrapy) Requirement already satisfied: attrs in /usr/lib/python2.7/site-packages (from service-identity->scrapy) Requirement already satisfied: pyasn1-modules in /usr/lib/python2.7/site-packages (from service-identity->scrapy) Requirement already satisfied: pyasn1 in /usr/lib/python2.7/site-packages (from service-identity->scrapy) Requirement already satisfied: setuptools in /usr/lib/python2.7/site-packages (from zope.interface>=3.6.0->Twisted>=13.1.0->scrapy) 后面执行命令： sudo pip install twisted==13.1.0成功了。
如果上面这安装不成功，可试下如下方式下载编译： wget https://twistedmatrix.com/Releases/Twisted/17.1/Twisted-17.1.0.tar.bz2 tar -jxvf Twisted-17.1.0.tar.bz2 cd Twisted-17.1.0 python setup.py install 参考：https://stackoverflow.com/questions/42731760/attributeerror-module-object-has-no-attribute-op-no-tlsv1-1 https://segmentfault.com/a/1190000009110685 http://bbs.csdn.net/topics/392135227 https://stackoverflow.com/questions/42573038/scrapy-module-object-has-no-attribute-op-single-ecdh-use
