Returns configuration value for a given [``section``] and ``name``.

        :param section: Section we want to retrieve value from
        :param name: Name of configuration we want to retrieve
        :param config_file: A path to file which should be used to retrieve
          configuration from (might also be a list of file paths)

def get_config_value(self, section, name, config_file=None):
        """
        Returns configuration value for a given [``section``] and ``name``.

        :param section: Section we want to retrieve value from
        :param name: Name of configuration we want to retrieve
        :param config_file: A path to file which should be used to retrieve
          configuration from (might also be a list of file paths)
        """
        if config_file is None:
            config_file = []
        elif isinstance(config_file, basestring):
            config_file = [config_file]

        def gen_configs():
            for path in config_file + self._config_files:
                try:
                    yield ConfigFile.from_path(path)
                except (IOError, OSError, ValueError):
                    continue

        for config in gen_configs():
            try:
                return config.get(section, name)
            except KeyError:
                continue
        return None