from lxml import etree

from lxml import objectify

class Config:

    def __init__(self):

        self.tree = None

        self.fname = None

    def new(self, fname=None):

        E = objectify.E

        self.root = E.psqlconsole(

            E.servers,

            E.editor(

                E.nodes(

                    E.node('-- Type your query here', name='Untitled', type='text'),

                    selected='Untitled'

                )

            ),

            E.window(

                E.size(

                    E.width(800),

                    E.height(600)

                ),

                E.dividers(

                    E.verticaldivider(300),

                    E.horizontaldivider(500),

                    E.editordivider(-1)

                )

            )

        )

        self.tree = etree.ElementTree(self.root)

        self.servers = self.root.servers

        self.fname = fname

    def load(self, fname=None):

        if fname:

            self.fname = fname

        self.tree = objectify.parse(self.fname)

        self.root = self.tree.getroot()

        self.servers = self.root.servers

    def save(self, fname=None):

        if fname:

            self.fname = fname

        self.tree.write(

            self.fname,

            encoding='utf-8',

            xml_declaration=True,

            pretty_print=True,

            compression=6)

    def add_server(self, name, host, port, user, password):

        e = etree.SubElement(self.servers, 'server')

        e.name = name

        e.host = host

        e.port = port

        e.user = user

        e.password = password

        return e

cfg = Config()

if __name__ == '__main__':

    cfg.load('../psqlconsole.xml.gz')

    print cfg.root.servers.server[0].host.text

    cfg.save()