$brewinstall python

$which python3

$wget https://bootstrap.pypa.io/get-pip.py

$ sudo python3 get-pip.py

$sudo -H python3 get-pip.py

Usage:   

  pip <command> [options]

Commands:

  install                     Install packages.

  download                    Download packages.

  uninstall                   Uninstall packages.

  freeze                      Output installed packages in requirements format.

  list                        List installed packages.

  show                        Show information about installed packages.

  check                       Verify installed packages have compatible dependencies.

  search                      Search PyPI for packages.

  wheel                       Build wheels from your requirements.

  hash                        Compute hashes of package archives.

  completion                  A helper command used for command completion.

  help                        Show help for commands.



General Options:

  -h, --help                  Show help.

  --isolated                  Run pip in an isolated mode, ignoring

                              environment variables and user configuration.

  -v, --verbose               Give more output. Option is additive, and can be

                              used up to 3 times.

  -V, --version               Show version and exit.

  -q, --quiet                 Give less output. Option is additive, and can be

                              used up to 3 times (corresponding to WARNING,

                              ERROR, and CRITICAL logging levels).

  --log <path>                Path to a verbose appending log.

  --proxy <proxy>             Specify a proxy in the form

                              [user:passwd@]proxy.server:port.

  --retries <retries>         Maximum number of retries each connection should

                              attempt (default 5 times).

  --timeout <sec>             Set the socket timeout (default 15 seconds).

  --exists-action <action>    Default action when a path already exists:

                              (s)witch, (i)gnore, (w)ipe, (b)ackup, (a)bort.

  --trusted-host <hostname>   Mark this host as trusted, even though it does

                              not have valid or any HTTPS.

  --cert <path>               Path to alternate CA bundle.

  --client-cert <path>        Path to SSL client certificate, a single file

                              containing the private key and the certificate

                              in PEM format.

  --cache-dir <dir>           Store the cache data in <dir>.

  --no-cache-dir              Disable the cache.

  --disable-pip-version-check

                              Don't periodically check PyPI to determine

                              whether a new version of pip is available for

                              download. Implied with --no-index.

cd ~

mkdir .pip

touch pip.conf

pip install -i https://pypi.tuna.tsinghua.edu.cn/simple pyspider

$pip3 install pillow

Collecting pillow

 Downloading Pillow-4.3.0-cp36-cp36m-macosx_10_6_intel.macosx_10_9_intel.macosx_10_9_x86_64.macosx_10_10_intel.macosx_10_10_x86_64.whl (3.5MB)

  100% |████████████████████████████████| 3.6MB 19kB/s 

Collecting olefile (from pillow)

 Downloading olefile-0.44.zip (74kB)

  100% |████████████████████████████████| 81kB 13kB/s 

Building wheels for collected packages: olefile

 Running setup.py bdist_wheel for olefile ... done

 Stored in directory: /Users/xsnai/Library/Caches/pip/wheels/20/58/49/cc7bd00345397059149a10b0259ef38b867935ea2ecff99a9b

Successfully built olefile

Installing collected packages: olefile, pillow

Successfully installed olefile-0.44 pillow-4.3.0

from PIL import Image
import pytesseract
text=pytesseract.image_to_string(Image.open('denggao.jpeg'),lang='chi_sim')
print(text)

pip3 install PIL 
pip3 install pytesseract