ubuntu14.04 安装scrapy 失败

Question

错误信息如下：

  Downloading cryptography-2.1.4.tar.gz (441kB): 441kB downloaded
  Running setup.py (path:/tmp/pip_build_root/cryptography/setup.py) egg_info for package cryptography
    error in cryptography setup command: Invalid environment marker: python_version < '3'
    Complete output from command python setup.py egg_info:
    error in cryptography setup command: Invalid environment marker: python_version < '3'

----------------------------------------
Cleaning up...
Command python setup.py egg_info failed with error code 1 in /tmp/pip_build_root/cryptography
Storing debug log for failure in /root/.pip/pip.log

我的python版本是python3.4呀

网上搜到的答案都试过了，还是不行，请高人指点

Answer 1

解决了，感谢楼上两位大侠提供的思路
我把/usr/local/lib/python2.7/dist-packages目录下的setuptools*文件全部删除，然后控制台输入

wget https://bootstrap.pypa.io/ez_setup.py -O - | sudo python

千万不要直接

pip install setuptools

这样默认安装的是最新版本，不支持2.*，然后运行pip安装啥都不行了

最后 pip install scrapy,成功！

Answer 2

sudo pip3 install scrapy

Answer 3

试试升级
pip install --upgrade setuptools