How to connect to the network and then internet in Python?

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Python

Ubuntu

networking

Internet

I want to write my own Network Manager in Python for Ubuntu. How can I do that? What tools will I need? If it is already written by someone, can some one please provide me a link?

Writing my own network manager is necessary if I have a minimal Ubuntu installation without Network manager. I want users to be able to connect to a network and therefore internet through eth0 or any other interface through my xyz program. which will run a Python script to achieve the work in the background and will display status like network manager.

Right now, I am editing "/etc/network/interfaces" and "/etc/resolv.conf", and executing "/etc/init.d/networking restart" to achieve this, but it does not seem much reliable.

I have heard that this can be achieved through dbus programming, but I don't know anything about that.

Please help.