当我尝试使用命令pip install ftfy安装此处的ftfy包时，在终端中遇到以下错误：
Collecting ftfy
Using cached https://files.pythonhosted.org/packages/d5/60/7b2d5d41ad6c6ebf48316b1c55ccf7c60d126e07f6306be9f254a139bfd1/ftfy-5.4.1.tar.gz
Complete output from command python setup.py egg_info:
Download error on https://pypi.org/simple/pytest-runner/: [SSL: TLSV1_ALERT_PROTOCOL_VERSION] tlsv1 alert protocol version (_ssl.c:645) -- Some packages may not be found!
Couldn't find index page for 'pytest-runner' (maybe misspelled?)
Download error on https://pypi.org/simple/: [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 pytest-runner
Traceback (most recent call last):
File "<string>", line 1, in <module>
File "/private/var/folders/f4/sb0f69y118l8_xvhflgrgsjnrl5c1r/T/pip-install-uxw5kcal/ftfy/setup.py", line 62, in <module>
'Documentation': 'http://ftfy.readthedocs.io',
File "/Users/raja.charuvil/kattoor/ce-etl/venv/lib/python3.5/site-packages/setuptools/__init__.py", line 139, in setup
_install_setup_requires(attrs)
File "/Users/raja.charuvil/kattoor/ce-etl/venv/lib/python3.5/site-packages/setuptools/__init__.py", line 134, in _install_setup_requires
dist.fetch_build_eggs(dist.setup_requires)
File "/Users/raja.charuvil/kattoor/ce-etl/venv/lib/python3.5/site-packages/setuptools/dist.py", line 514, in fetch_build_eggs
replace_conflicting=True,
File "/Users/raja.charuvil/kattoor/ce-etl/venv/lib/python3.5/site-packages/pkg_resources/__init__.py", line 777, in resolve
replace_conflicting=replace_conflicting
File "/Users/raja.charuvil/kattoor/ce-etl/venv/lib/python3.5/site-packages/pkg_resources/__init__.py", line 1060, in best_match
return self.obtain(req, installer)
File "/Users/raja.charuvil/kattoor/ce-etl/venv/lib/python3.5/site-packages/pkg_resources/__init__.py", line 1072, in obtain
return installer(requirement)
File "/Users/raja.charuvil/kattoor/ce-etl/venv/lib/python3.5/site-packages/setuptools/dist.py", line 581, in fetch_build_egg
return cmd.easy_install(req)
File "/Users/raja.charuvil/kattoor/ce-etl/venv/lib/python3.5/site-packages/setuptools/command/easy_install.py", line 670, in easy_install
raise DistutilsError(msg)
distutils.errors.DistutilsError: Could not find suitable distribution for Requirement.parse('pytest-runner')
----------------------------------------
Command "python setup.py egg_info" failed with error code 1 in /private/var/folders/f4/sb0f69y118l8_xvhflgrgsjnrl5c1r/T/pip-install-uxw5kcal/ftfy/
我正在使用Mac OS和Python 3.5。
我尝试使用此链接中的解决方案，但无法解决我的问题。