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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def save_conf(fn=None):
 """Save current configuration to file as YAML If not given, uses current config directory, ``confdir``, which can be set by INTAKE_CONF_DIR. """

    if fn is None:
        fn = cfile()
    try:
        os.makedirs(os.path.dirname(fn))
    except (OSError, IOError):
        pass
    with open(fn, 'w') as f:
        yaml.dump(conf, f)