This method write a sample file, with attributes, descriptions,
        sample values, required flags, using the configuration object
        properties.

def write_default_config_file(self, output, comments=True):
        """This method write a sample file, with attributes, descriptions,
        sample values, required flags, using the configuration object
        properties.
        """
        if self.use_config_file:
            # pylint: disable-msg=W0621
            log = logging.getLogger('argtoolbox')
            with open(output, 'w') as f:
                if comments:
                    f.write("#####################################\n")
                    f.write("# Description :\n")
                    f.write("# -------------\n# ")
                    for i in self._desc.split('\n'):
                        f.write("# ")
                        f.write(i)
                        f.write("\n")
                    f.write("\n\n")

                for s in self.sections.values():
                    log.debug("loading section : " + s.get_section_name())
                    s.write_config_file(f, comments)
            log.debug("config file generation completed : " + str(output))