新安装centos安装scrapy出现的问题。

Q:error: Setup script exited with error: command ‘gcc’ failed with exit status 1
A:yum install gcc libffi-devel python-devel openssl-devel
Q:AttributeError: 'module' object has no attribute 'OP_NO_TLSv1_1'
A:pip install twisted==13.1.0