How to use the pgcli.config.config_location function in pgcli

def cli(database, username_opt, host, port, prompt_passwd, never_prompt,
        single_connection, dbname, username, version, pgclirc, dsn, row_limit,
        less_chatty, prompt, prompt_dsn, list_databases, auto_vertical_output):

    if version:
        print('Version:', __version__)
        sys.exit(0)

    config_dir = os.path.dirname(config_location())
    if not os.path.exists(config_dir):
        os.makedirs(config_dir)

    # Migrate the config file from old location.
    config_full_path = config_location() + 'config'
    if os.path.exists(os.path.expanduser('~/.pgclirc')):
        if not os.path.exists(config_full_path):
            shutil.move(os.path.expanduser('~/.pgclirc'), config_full_path)
            print ('Config file (~/.pgclirc) moved to new location',
                   config_full_path)
        else:
            print ('Config file is now located at', config_full_path)
            print ('Please move the existing config file ~/.pgclirc to',
                   config_full_path)

    pgcli = PGCli(prompt_passwd, never_prompt, pgclirc_file=pgclirc,
                  row_limit=row_limit, single_connection=single_connection,
                  less_chatty=less_chatty, prompt=prompt, prompt_dsn=prompt_dsn,
                  auto_vertical_output=auto_vertical_output)

    # Choose which ever one has a valid value.

def cli(database, username_opt, host, port, prompt_passwd, never_prompt,
        single_connection, dbname, username, version, pgclirc, dsn, row_limit,
        less_chatty, prompt, prompt_dsn, list_databases, auto_vertical_output):

    if version:
        print('Version:', __version__)
        sys.exit(0)

    config_dir = os.path.dirname(config_location())
    if not os.path.exists(config_dir):
        os.makedirs(config_dir)

    # Migrate the config file from old location.
    config_full_path = config_location() + 'config'
    if os.path.exists(os.path.expanduser('~/.pgclirc')):
        if not os.path.exists(config_full_path):
            shutil.move(os.path.expanduser('~/.pgclirc'), config_full_path)
            print ('Config file (~/.pgclirc) moved to new location',
                   config_full_path)
        else:
            print ('Config file is now located at', config_full_path)
            print ('Please move the existing config file ~/.pgclirc to',
                   config_full_path)

    pgcli = PGCli(prompt_passwd, never_prompt, pgclirc_file=pgclirc,

def get_config_log_dir():
    """
        Retrieve logging directory, create it if it doesn't exist.
    """
    return config_location()

def run_cli(self):
        logger = self.logger

        history_file = self.config["main"]["history_file"]
        if history_file == "default":
            history_file = config_location() + "history"
        history = FileHistory(os.path.expanduser(history_file))
        self.refresh_completions(history=history, persist_priorities="none")

        self.prompt_app = self._build_cli(history)

        if not self.less_chatty:
            print("Server: PostgreSQL", self.pgexecute.server_version)
            print("Version:", __version__)
            print("Chat: https://gitter.im/dbcli/pgcli")
            print("Home: http://pgcli.com")

        try:
            while True:
                try:
                    text = self.prompt_app.prompt()
                except KeyboardInterrupt:

def run_cli(self):
        logger = self.logger

        history_file = self.config['main']['history_file']
        if history_file == 'default':
            history_file = config_location() + 'history'
        history = FileHistory(os.path.expanduser(history_file))
        self.refresh_completions(history=history,
                                 persist_priorities='none')

        self.cli = self._build_cli(history)

        if not self.less_chatty:
            print('Version:', __version__)
            print('Chat: https://gitter.im/dbcli/pgcli')
            print('Mail: https://groups.google.com/forum/#!forum/pgcli')
            print('Home: http://pgcli.com')

        try:
            while True:
                document = self.cli.run()

def initialize_logging(self):

        log_file = self.config['main']['log_file']
        if log_file == 'default':
            log_file = config_location() + 'log'
        ensure_dir_exists(log_file)
        log_level = self.config['main']['log_level']

        # Disable logging if value is NONE by switching to a no-op handler.
        # Set log level to a high value so it doesn't even waste cycles getting called.
        if log_level.upper() == 'NONE':
            handler = logging.NullHandler()
        else:
            handler = logging.FileHandler(os.path.expanduser(log_file))

        level_map = {'CRITICAL': logging.CRITICAL,
                     'ERROR': logging.ERROR,
                     'WARNING': logging.WARNING,
                     'INFO': logging.INFO,
                     'DEBUG': logging.DEBUG,
                     'NONE': logging.CRITICAL

def initialize_logging(self):

        log_file = self.config["main"]["log_file"]
        if log_file == "default":
            log_file = config_location() + "log"
        ensure_dir_exists(log_file)
        log_level = self.config["main"]["log_level"]

        # Disable logging if value is NONE by switching to a no-op handler.
        # Set log level to a high value so it doesn't even waste cycles getting called.
        if log_level.upper() == "NONE":
            handler = logging.NullHandler()
        else:
            handler = logging.FileHandler(os.path.expanduser(log_file))

        level_map = {
            "CRITICAL": logging.CRITICAL,
            "ERROR": logging.ERROR,
            "WARNING": logging.WARNING,
            "INFO": logging.INFO,
            "DEBUG": logging.DEBUG,