How to use the trytond.config.config.get function in trytond

def get_webdav_url():
    if config.get('ssl', 'privatekey'):
        protocol = 'https'
    else:
        protocol = 'http'
    hostname = (config.get('webdav', 'hostname')
        or unicode(socket.getfqdn(), 'utf8'))
    hostname = '.'.join(encodings.idna.ToASCII(part) for part in
        hostname.split('.'))
    return urlparse.urlunsplit((protocol, hostname,
        urllib.quote(
            Transaction().cursor.database_name.encode('utf-8') + '/'),
            None, None))

def list(self, hostname=None):
        res = []
        listdir = [':memory:']
        try:
            listdir += os.listdir(config.get('database', 'path'))
        except OSError:
            pass
        for db_file in listdir:
            if db_file.endswith('.sqlite') or db_file == ':memory:':
                if db_file == ':memory:':
                    db_name = ':memory:'
                else:
                    db_name = db_file[:-7]
                try:
                    database = Database(db_name).connect()
                except Exception:
                    logger.debug(
                        'Test failed for "%s"', db_name, exc_info=True)
                    continue
                if database.test(hostname=hostname):
                    res.append(db_name)

def setmany(self, data, prefix=''):
        return [self.set(d, prefix) for d in data]

    def _filename(self, id, prefix):
        path = os.path.normpath(config.get('database', 'path'))
        filename = os.path.join(path, prefix, id[0:2], id[2:4], id)
        filename = os.path.normpath(filename)
        if not filename.startswith(path):
            raise ValueError('Bad prefix')
        return filename

    def _id(self, data):
        return hashlib.md5(data).hexdigest()


if config.get('database', 'class'):
    FileStore = resolve(config.get('database', 'class'))  # noqa: F811
filestore = FileStore()

from trytond.transaction import Transaction
from .resource import ResourceMixin, resource_copy

__all__ = ['AttachmentCopyMixin']


def firstline(description):
    try:
        return next((x for x in description.splitlines() if x.strip()))
    except StopIteration:
        return ''


if config.getboolean('attachment', 'filestore', default=True):
    file_id = 'file_id'
    store_prefix = config.get('attachment', 'store_prefix', default=None)
else:
    file_id = None
    store_prefix = None


class Attachment(ResourceMixin, ModelSQL, ModelView):
    "Attachment"
    __name__ = 'ir.attachment'
    name = fields.Char('Name', required=True)
    type = fields.Selection([
        ('data', 'Data'),
        ('link', 'Link'),
        ], 'Type', required=True)
    description = fields.Text('Description')
    summary = fields.Function(fields.Char('Summary'), 'on_change_with_summary')
    link = fields.Char('Link', states={

def _connection_params(cls, name):
        uri = parse_uri(config.get('database', 'uri'))
        params = {
            'dbname': name,
            }
        if uri.username:
            params['user'] = uri.username
        if uri.password:
            params['password'] = urllib.parse.unquote_plus(uri.password)
        if uri.hostname:
            params['host'] = uri.hostname
        if uri.port:
            params['port'] = uri.port
        return params

except ImportError:
    from http import client as HTTPStatus

from werkzeug.exceptions import abort
from werkzeug.utils import redirect
from werkzeug.wrappers import Response

from trytond.i18n import gettext
from trytond.config import config
from trytond.wsgi import app
from trytond.protocols.jsonrpc import JSONDecoder
from trytond.protocols.wrappers import with_pool, with_transaction
from trytond.tools import slugify
from trytond.transaction import Transaction

SOURCE = config.get(
    'html', 'src', default='https://cloud.tinymce.com/stable/tinymce.min.js')


def get_token(record):
    return str((record.write_date or record.create_date).timestamp())


def get_config(names, section='html', default=None):
    names = names[:]
    while names:
        value = config.get(section, '-'.join(names))
        if value is not None:
            return value
        names = names[:-1]
    return default

def get_relation_fields(cls):
        if not config.get('dict', cls.__name__, default=True):
            return {}
        fields = cls._relation_fields_cache.get(cls.__name__)
        if fields is not None:
            return fields
        keys = cls.get_keys(cls.search([]))
        fields = {k['name']: k for k in keys}
        cls._relation_fields_cache.set(cls.__name__, fields)
        return fields

def get_connection(self, autocommit=False, readonly=False):
        conv = MySQLdb.converters.conversions.copy()
        conv[float] = lambda value, _: repr(value)
        conv[MySQLdb.constants.FIELD_TYPE.TIME] = MySQLdb.times.Time_or_None
        args = {
            'db': self.name,
            'sql_mode': 'traditional,postgresql',
            'use_unicode': True,
            'charset': 'utf8',
            'conv': conv,
        }
        uri = parse_uri(config.get('database', 'uri'))
        if uri.hostname:
            args['host'] = uri.hostname
        if uri.port:
            args['port'] = uri.port
        if uri.username:
            args['user'] = uri.username
        if uri.password:
            args['passwd'] = urllib.unquote_plus(uri.password)
        conn = MySQLdb.connect(**args)
        cursor = conn.cursor()
        cursor.execute('SET time_zone = "+00:00"')
        return conn

from trytond import backend
from trytond.wsgi import app
from trytond.transaction import Transaction
from trytond.protocols.jsonrpc import JSONEncoder, JSONDecoder
from trytond.config import config
from trytond.tools import resolve


logger = logging.getLogger(__name__)

_db_timeout = config.getint('database', 'timeout')
_cache_timeout = config.getint('bus', 'cache_timeout')
_select_timeout = config.getint('bus', 'select_timeout')
_long_polling_timeout = config.getint('bus', 'long_polling_timeout')
_allow_subscribe = config.getboolean('bus', 'allow_subscribe')
_url_host = config.get('bus', 'url_host')
_web_cache_timeout = config.getint('web', 'cache_timeout')


class _MessageQueue:

    Message = collections.namedtuple('Message', 'channel content timestamp')

    def __init__(self, timeout):
        super().__init__()
        self._lock = threading.Lock()
        self._timeout = timeout
        self._messages = []

    def append(self, channel, element):
        self._messages.append(
            self.Message(channel, element, time.time()))