我是python新手，无法在我的Mac OS 10.10.15上安装Scrapy。我安装了brew并能够设置虚拟环境。
(scrapdata)
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$ pip3 install scrapy
Collecting scrapy
Using cached Scrapy-1.4.0-py2.py3-none-any.whl
Collecting pyOpenSSL (from scrapy)
Using cached pyOpenSSL-17.2.0-py2.py3-none-any.whl
Collecting Twisted>=13.1.0 (from scrapy)
Using cached Twisted-17.5.0.tar.bz2
Complete output from command python setup.py egg_info:
Download error on https://pypi.python.org/simple/incremental/: [SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed (_ssl.c:748) -- Some packages may not be found!
Couldn't find index page for 'incremental' (maybe misspelled?)
Download error on https://pypi.python.org/simple/: [SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed (_ssl.c:748) -- Some packages may not be found!
No local packages or working download links found for incremental>=16.10.1
Traceback (most recent call last):
File "<string>", line 1, in <module>
File "/private/var/folders/qt/0m1c18vs4wj_xwmw40m92v7w0000gn/T/pip-build-x9273g0d/Twisted/setup.py", line 21, in <module>
setuptools.setup(**_setup["getSetupArgs"]())
File "/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/distutils/core.py", line 108, in setup
_setup_distribution = dist = klass(attrs)
File "/User/UserName/scrapdata/lib/python3.6/site-packages/setuptools/dist.py", line 325, in __init__
self.fetch_build_eggs(attrs['setup_requires'])
File "/Users/UserName/scrapdata/lib/python3.6/site-packages/setuptools/dist.py", line 446, in fetch_build_eggs
replace_conflicting=True,
File "/Users/UserName/scrapdata/lib/python3.6/site-packages/pkg_resources/__init__.py", line 855, in resolve
dist = best[req.key] = env.best_match(req, ws, installer)
File "/Users/UserName/scrapdata/lib/python3.6/site-packages/pkg_resources/__init__.py", line 1127, in best_match
return self.obtain(req, installer)
File "/Users/UserName/scrapdata/lib/python3.6/site-packages/pkg_resources/__init__.py", line 1139, in obtain
return installer(requirement)
File "/Users/UserName/scrapdata/lib/python3.6/site-packages/setuptools/dist.py", line 518, in fetch_build_egg
return cmd.easy_install(req)
File "/Users/UserName/scrapdata/lib/python3.6/site-packages/setuptools/command/easy_install.py", line 666, in easy_install
raise DistutilsError(msg)
distutils.errors.DistutilsError: Could not find suitable distribution for Requirement.parse('incremental>=16.10.1')
----------------------------------------
Command "python setup.py egg_info" failed with error code 1 in /private/var/folders/qt/0m1c18vs4wj_xwmw40m92v7w0000gn/T/pip-build-x9273g0d/Twisted/
我已经粘贴了输出。 还尝试安装安装工具，展开并easy_setup但没有任何效果。 请帮忙。谢谢！
你试过以下吗？
- 删除并重新创建您的虚拟环境？
- 使用
pip中的--no-cache-dir选项 - 如果这不起作用，请清除位于
~/Library/Caches/pip的缓存，然后重试？
我刚刚使用pyenv进行了测试(强烈推荐(，它没有任何问题，我也在macOS Sierra上。 祝你好运！
编辑#1：当我想到这一点时，鉴于错误中的整个SSL字符串，您可能会有一些古怪的Python/MacOS事情。 看看这个SO帖子，因为它与您正在经历的非常相似==>"SSL证书验证失败"使用pip安装软件包