Network sockets is a way to talk to other computers using standard Unix file descriptors, which allow communication between two different processes on the same or different machines. A socket is almost similar to a low-level file descriptor, because commands such as read() and write() also work with sockets as they do with files.
Python has two basic sockets modules:
Socket: The standard BSD sockets API.
SocketServer: A server-centric module that defines classes for handling synchronous network requests that simplify the development of network servers.
The socket module has almost everything you need to build a socket server or client. In the case of Python, the socket returns an object to which the socket methods can be applied.