Start python

xcode command line tools

• After clean install with macOs sierra, when I entered the git command on terminal, it was installed automatically.
• The original procedure is as follows.

% sudo xcode-select --install

Check python

• If you install xcode command line tools, you can use commands such as git, python, and ruby.
• It was the 2nd system of python that was installed.

% which python
/usr/bin/python

% python --version
Python 2.7.10

What is pip

• A tool for managing third-party packages.
• Since it was not installed with xcode command line tools, it was installed by referring to the guide on the Official Site.
• Download get-pip.py and run it in python.

% curl -fsSL https://bootstrap.pypa.io/get-pip.py | sudo python
Password:
The directory '/Users/devsoul/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/devsoul/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-8.1.2-py2.py3-none-any.whl (1.2MB)
    100% |████████████████████████████████| 1.2MB 1.1MB/s
Collecting wheel
  Downloading wheel-0.29.0-py2.py3-none-any.whl (66kB)
    100% |████████████████████████████████| 71kB 9.3MB/s
Installing collected packages: pip, wheel
Successfully installed pip-8.1.2 wheel-0.29.0

% which pip
/usr/local/bin/pip

• If I don't run python with sudo, I get the error permission denied.
• When I checked the list, various packages were already installed.

% pip list
altgraph (0.10.2)
bdist-mpkg (0.5.0)
bonjour-py (0.3)
macholib (1.5.1)
matplotlib (1.3.1)
modulegraph (0.10.4)
numpy (1.8.0rc1)
pip (8.1.2)
py2app (0.7.3)
pyobjc-core (2.5.1)
pyobjc-framework-Accounts (2.5.1)
pyobjc-framework-AddressBook (2.5.1)
pyobjc-framework-AppleScriptKit (2.5.1)
pyobjc-framework-AppleScriptObjC (2.5.1)
pyobjc-framework-Automator (2.5.1)
pyobjc-framework-CFNetwork (2.5.1)
pyobjc-framework-Cocoa (2.5.1)
pyobjc-framework-Collaboration (2.5.1)
pyobjc-framework-CoreData (2.5.1)
pyobjc-framework-CoreLocation (2.5.1)
pyobjc-framework-CoreText (2.5.1)
pyobjc-framework-DictionaryServices (2.5.1)
pyobjc-framework-EventKit (2.5.1)
pyobjc-framework-ExceptionHandling (2.5.1)
pyobjc-framework-FSEvents (2.5.1)
pyobjc-framework-InputMethodKit (2.5.1)
pyobjc-framework-InstallerPlugins (2.5.1)
pyobjc-framework-InstantMessage (2.5.1)
pyobjc-framework-LatentSemanticMapping (2.5.1)
pyobjc-framework-LaunchServices (2.5.1)
pyobjc-framework-Message (2.5.1)
pyobjc-framework-OpenDirectory (2.5.1)
pyobjc-framework-PreferencePanes (2.5.1)
pyobjc-framework-PubSub (2.5.1)
pyobjc-framework-QTKit (2.5.1)
pyobjc-framework-Quartz (2.5.1)
pyobjc-framework-ScreenSaver (2.5.1)
pyobjc-framework-ScriptingBridge (2.5.1)
pyobjc-framework-SearchKit (2.5.1)
pyobjc-framework-ServiceManagement (2.5.1)
pyobjc-framework-Social (2.5.1)
pyobjc-framework-SyncServices (2.5.1)
pyobjc-framework-SystemConfiguration (2.5.1)
pyobjc-framework-WebKit (2.5.1)
pyOpenSSL (0.13.1)
pyparsing (2.0.1)
python-dateutil (1.5)
pytz (2013.7)
scipy (0.13.0b1)
setuptools (18.5)
six (1.4.1)
vboxapi (1.0)
wheel (0.29.0)
xattr (0.6.4)
zope.interface (4.1.1)

python vs python3

• It seems that python can be handled as a different thing like angular if the major version is different.
• So-called incompatibility. The command for the 2nd series was python, and the command for the 3rd series was python3.
• Package management is also divided into pip and pip3.
• 3 series is not provided by xcode commnad line tools. It is recommended to install with brew.