The easiest way to install Ansible, is to use pip, the Python package manager. Some of newer versions of Python have pip already (Python 2.7.9 or later and Python 3.4 or later):

1. To confirm whether pip is installed or not, similar to the Python command, use -V:

//use capital V
$ pip -V
pip 9.0.1 from /Library/Python/2.7/site-packages (python 2.7)

2. On the other hand, if you see the following result, you need to install pip:

//this result shows you don't have pip yet
$ pip -V
-bash: pip: command not found

3. In order to install pip, download get-pip.py and install by using the following command:

//download pip install script
$ curl -LO https://bootstrap.pypa.io/get-pip.py


//run get-pip.py by privileged user (sudo)
$ sudo python get-pip.py 
Collecting pip
  Downloading pip-9.0.1-py2.py3-none-any.whl (1.3MB)
    100% |################################| 1.3MB 779kB/s 
Collecting wheel
  Downloading wheel-0.30.0-py2.py3-none-any.whl (49kB)
    100% |################################| 51kB 1.5MB/s 
Installing collected packages: pip, wheel
Successfully installed pip-9.0.1 wheel-0.30.0


//now you have pip command
$ pip -V
pip 9.0.1 from /usr/lib/python2.7/site-packages (python 2.7)