在虚拟环境中安装drf-haystack时，pip报错
Liang-2:~ langying$ pip install django-haystack
Collecting django-haystack
Using cached https://files.pythonhosted.org/packages/69/43/3e247b7b2134b48e9a53fb387e191e5e05b5f38f2faf78ca892097c2b441/django-haystack-2.8.1.tar.gz
Complete output from command python setup.py egg_info:
Download error on https://pypi.python.org/simple/setuptools_scm/: [SSL: TLSV1_ALERT_PROTOCOL_VERSION] tlsv1 alert protocol version (_ssl.c:719) -- Some packages may not be found!
Download error on https://pypi.python.org/simple/setuptools-scm/: [SSL: TLSV1_ALERT_PROTOCOL_VERSION] tlsv1 alert protocol version (_ssl.c:719) -- Some packages may not be found!
Couldn't find index page for 'setuptools_scm' (maybe misspelled?)
Download error on https://pypi.python.org/simple/: [SSL: TLSV1_ALERT_PROTOCOL_VERSION] tlsv1 alert protocol version (_ssl.c:719) -- Some packages may not be found!
No local packages or working download links found for setuptools_scm
Traceback (most recent call last):
File "<string>", line 1, in <module>
File "/private/var/folders/gw/_6fk5dxj25s596zy2h29j6tc0000gn/T/pip-install-l0kpttd_/django-haystack/setup.py", line 71, in <module>
setup_requires=['setuptools_scm'],
File "/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/distutils/core.py", line 108, in setup
_setup_distribution = dist = klass(attrs)
File "/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/setuptools/dist.py", line 315, in __init__
self.fetch_build_eggs(attrs['setup_requires'])
File "/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/setuptools/dist.py", line 361, in fetch_build_eggs
replace_conflicting=True,
File "/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/pkg_resources/__init__.py", line 850, in resolve
dist = best[req.key] = env.best_match(req, ws, installer)
File "/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/pkg_resources/__init__.py", line 1122, in best_match
return self.obtain(req, installer)
File "/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/pkg_resources/__init__.py", line 1134, in obtain
return installer(requirement)
File "/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/setuptools/dist.py", line 429, in fetch_build_egg
return cmd.easy_install(req)
File "/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/setuptools/command/easy_install.py", line 659, in easy_install
raise DistutilsError(msg)
distutils.errors.DistutilsError: Could not find suitable distribution for Requirement.parse('setuptools_scm')
----------------------------------------
Command "python setup.py egg_info" failed with error code 1 in /private/var/folders/gw/_6fk5dxj25s596zy2h29j6tc0000gn/T/pip-install-l0kpttd_/django-haystack/
报出错误为下载工具中文件缺失问题，
Download error on https://pypi.org/simple/setuptools-scm/: [SSL: TLSV1_ALERT_PROTOCOL_VERSION] tlsv1 alert protocol version (_ssl.c:645) -- Some packages may not be found!
No local packages or working download links found for setuptools_scm
故通过https://pypi.org/simple/setuptools-scm/下载补丁setuptools_scm-3.0.6-py2.py3-none-any.whl进行解决。
通过pip install setuptools_scm-3.0.6-py2.py3-none-any.whl
后进行sudo pip install drf-haystack解决