chins-MBP:~ chinvincent$ pip install scrapy
Collecting scrapy
  Using cached https://files.pythonhosted.org/packages/db/9c/cb15b2dc6003a805afd21b9b396e0e965800765b51da72fe17cf340b9be2/Scrapy-1.5.0-py2.py3-none-any.whl
Collecting lxml (from scrapy)
  Using cached https://files.pythonhosted.org/packages/18/95/abf8204fbbc9a01e0e156029cd1ee974237b5798b9e84477df6c4fabfbd2/lxml-4.2.1-cp27-cp27m-macosx_10_6_intel.macosx_10_9_intel.macosx_10_9_x86_64.macosx_10_10_intel.macosx_10_10_x86_64.whl
Collecting PyDispatcher>=2.0.5 (from scrapy)
  Using cached https://files.pythonhosted.org/packages/cd/37/39aca520918ce1935bea9c356bcbb7ed7e52ad4e31bff9b943dfc8e7115b/PyDispatcher-2.0.5.tar.gz
Collecting Twisted>=13.1.0 (from scrapy)
  Using cached https://files.pythonhosted.org/packages/12/2a/e9e4fb2e6b2f7a75577e0614926819a472934b0b85f205ba5d5d2add54d0/Twisted-18.4.0.tar.bz2
    Complete output from command python setup.py egg_info:
    Download error on https://pypi.python.org/simple/incremental/: [SSL: TLSV1_ALERT_PROTOCOL_VERSION] tlsv1 alert protocol version (_ssl.c:590) -- Some packages may not be found!
    Couldn't find index page for 'incremental' (maybe misspelled?)
    Download error on https://pypi.python.org/simple/: [SSL: TLSV1_ALERT_PROTOCOL_VERSION] tlsv1 alert protocol version (_ssl.c:590) -- Some packages may not be found!
    No local packages or download links found for incremental>=16.10.1
    Traceback (most recent call last):
      File "<string>", line 1, in <module>
      File "/private/var/folders/k3/_9l9qs091892r7lzz4x_tf1c0000gn/T/pip-install-CGLSZl/Twisted/setup.py", line 21, in <module>
        setuptools.setup(**_setup["getSetupArgs"]())
      File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/distutils/core.py", line 111, in setup
        _setup_distribution = dist = klass(attrs)
      File "/System/Library/Frameworks/Python.framework/Versions/2.7/Extras/lib/python/setuptools/dist.py", line 268, in __init__
        self.fetch_build_eggs(attrs['setup_requires'])
      File "/System/Library/Frameworks/Python.framework/Versions/2.7/Extras/lib/python/setuptools/dist.py", line 313, in fetch_build_eggs
        replace_conflicting=True,
      File "/System/Library/Frameworks/Python.framework/Versions/2.7/Extras/lib/python/pkg_resources/__init__.py", line 843, in resolve
        dist = best[req.key] = env.best_match(req, ws, installer)
      File "/System/Library/Frameworks/Python.framework/Versions/2.7/Extras/lib/python/pkg_resources/__init__.py", line 1088, in best_match
        return self.obtain(req, installer)
      File "/System/Library/Frameworks/Python.framework/Versions/2.7/Extras/lib/python/pkg_resources/__init__.py", line 1100, in obtain
        return installer(requirement)
      File "/System/Library/Frameworks/Python.framework/Versions/2.7/Extras/lib/python/setuptools/dist.py", line 380, in fetch_build_egg
        return cmd.easy_install(req)
      File "/System/Library/Frameworks/Python.framework/Versions/2.7/Extras/lib/python/setuptools/command/easy_install.py", line 632, 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/k3/_9l9qs091892r7lzz4x_tf1c0000gn/T/pip-install-CGLSZl/Twisted/
chins-MBP:~ chinvincent$ sudo pip install incremental
Password:
Sorry, try again.
Password:
Sorry, try again.
Password:
The directory '/Users/chinvincent/Library/Caches/pip/http' or its parent directory is not owned by the current user and the cache has been disabled. Please check the permissions and owner of that directory. If executing pip with sudo, you may want sudo's -H flag.
The directory '/Users/chinvincent/Library/Caches/pip' or its parent directory is not owned by the current user and caching wheels has been disabled. check the permissions and owner of that directory. If executing pip with sudo, you may want sudo's -H flag.
Requirement already satisfied: incremental in ./Library/Python/2.7/lib/python/site-packages (17.5.0)