[Error 13] Permission denied

[xx$ python get-pip.py

Collecting pip

  Downloading pip-9.0.1-py2.py3-none-any.whl (1.3MB)

    100% |████████████████████████████████| 1.3MB 43kB/s 

Collecting wheel

  Downloading wheel-0.29.0-py2.py3-none-any.whl (66kB)

    100% |████████████████████████████████| 71kB 46kB/s 

Installing collected packages: pip, wheel

Exception:

Traceback (most recent call last):

  File "/var/folders/fs/x50tw_r94zd3gghrnt0svw1r0000gn/T/tmpFJ3Rdb/pip.zip/pip/basecommand.py", line 215, in main

    status = self.run(options, args)

  File "/var/folders/fs/x50tw_r94zd3gghrnt0svw1r0000gn/T/tmpFJ3Rdb/pip.zip/pip/commands/install.py", line 342, in run

    prefix=options.prefix_path,

  File "/var/folders/fs/x50tw_r94zd3gghrnt0svw1r0000gn/T/tmpFJ3Rdb/pip.zip/pip/req/req_set.py", line 784, in install

    **kwargs

  File "/var/folders/fs/x50tw_r94zd3gghrnt0svw1r0000gn/T/tmpFJ3Rdb/pip.zip/pip/req/req_install.py", line 851, in install

    self.move_wheel_files(self.source_dir, root=root, prefix=prefix)

  File "/var/folders/fs/x50tw_r94zd3gghrnt0svw1r0000gn/T/tmpFJ3Rdb/pip.zip/pip/req/req_install.py", line 1064, in move_wheel_files

    isolated=self.isolated,

  File "/var/folders/fs/x50tw_r94zd3gghrnt0svw1r0000gn/T/tmpFJ3Rdb/pip.zip/pip/wheel.py", line 345, in move_wheel_files

    clobber(source, lib_dir, True)

  File "/var/folders/fs/x50tw_r94zd3gghrnt0svw1r0000gn/T/tmpFJ3Rdb/pip.zip/pip/wheel.py", line 316, in clobber

    ensure_dir(destdir)

  File "/var/folders/fs/x50tw_r94zd3gghrnt0svw1r0000gn/T/tmpFJ3Rdb/pip.zip/pip/utils/__init__.py", line 83, in ensure_dir

    os.makedirs(path)

  File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/os.py", line 157, in makedirs

    mkdir(name, mode)

OSError: [Errno 13] Permission denied: '/Library/Python/2.7/site-packages/pip'

[huangjianfeng$ pip

-bash: pip: command not found

[huangjianfeng$ OSError: [Errno 13] Permission denied: '/Library/Python/2.7/site-packages/pip'

[huangjianfeng$ sudo python get-pip.py

Password:

The directory '/Users/huangjianfeng/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/huangjianfeng/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.

Collecting pip

  Downloading pip-9.0.1-py2.py3-none-any.whl (1.3MB)

    100% |████████████████████████████████| 1.3MB 37kB/s 

Collecting wheel

  Downloading wheel-0.29.0-py2.py3-none-any.whl (66kB)

    100% |████████████████████████████████| 71kB 49kB/s 

Installing collected packages: pip, wheel

Successfully installed pip-9.0.1 wheel-0.29.0

[xx$