code: def write_option(option, value, section="cli", system=False):
      
      # deny rwx to Group and World -- don't bother storing the returned old mask
      # value, since we'll never restore it in the CLI anyway
      # do this on every call to ensure that we're always consistent about it
      os.umask(0o077)
  
      # FIXME: DRY violation with config_commands.helpers
      conf = get_config_obj(system=system)
  
      # add the section if absent
      if section not in conf:
          conf[section] = {}
  
      conf[section][option] = value
      conf.write()
docs: Write an option to disk -- doesn't handle config reloading