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Pexpect installation

Since this is the first package we will install, we will install both the pip tool with the pexpect package. The process is pretty straightforward:

sudo apt-get install python-pip #Python2
sudo apt-get install python3-pip
sudo pip3 install pexpect
sudo pip install pexpect #Python2

I am using pip3 to install Python 3 packages, while using pip to install packages in the Python 2 environment.

Do a quick to test to make sure the package is usable:

>>> import pexpect
>>> dir(pexpect)
['EOF', 'ExceptionPexpect', 'Expecter', 'PY3', 
  'TIMEOUT', '__all__', '__builtins__', '__cached__', 
  '__doc__', '__file__', '__loader__', '__name__', 
  '__package__', '__path__', '__revision__', 
  '__spec__', '__version__', 'exceptions', 'expect', 
  'is_executable_file', 'pty_spawn', 'run', 'runu', 
  'searcher_re', 'searcher_string', 'spawn', 
  'spawnbase', 'spawnu', 'split_command_line', 'sys',
  'utils', 'which']
>>>