Tratto is a tiny framework I  built to issue commands to cisco 
routers over ssh and telnet.  I used pexpect.

Systems.py - Is a file that defines properties of different
operating systems

Connectivity.py - Is a file that defines connectivity objects
such as Session.

test.py -  Example usages of how to use Tratto.

Examples - A Directory of real-world examples of tratto
   l3toPTR.py - A script that connects to a Cisco IOS device
                issues "sho ip int br" and generates dns names
                for the given l3 interface.  This can be useful
                to generate ptr records for traceroutes. 


tratto is now a somewhat proper module, so you can import it like:
from tratto.systems import * etc...

Systems.OperatingSystems has been replaced with tratto.systems.SystemProfiles

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20151028
Tratto is a tiny framework from akonkol.
I like it very much. So i thinks it is a good way to learn how to use script to maintain the Network.

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20151028
##The modified is from my linux.

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20151029
##Thinking how to avoid leak my passwork on GitHub when i want to use the same script to change.
##Add a new class HuaweiIOS in System.py
##Read the origin codes of tratto