<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def config_pp(subs):
 """Pretty print of configuration options. Args: subs (iterable of str):
 iterable with the list of conf sections to print. """

    print('(c|f): available only as CLI argument/in the config file',
          end='\n\n')
    for sub in subs:
        hlp_lst = []
        for opt, meta in conf[sub].defaults_():
            if meta.cmd_arg ^ meta.conf_arg:
                opt += ' (c)' if meta.cmd_arg else ' (f)'
            hlp_lst.append((opt, meta.help))
        if hlp_lst:
            print('{}:'.format(sub))
            _pretty_print(hlp_lst, sep=' -- ',
                          text_width=min(get_terminal_size().columns, 100))
            print()