How to use the configparser.ConfigParser.SafeConfigParser function in configparser

def _get_config(stunnel_check_cert_validity):
    try:
        config = ConfigParser.SafeConfigParser()
    except AttributeError:
        config = ConfigParser()
    config.add_section(mount_efs.CONFIG_SECTION)
    if stunnel_check_cert_validity is not None:
        config.set(mount_efs.CONFIG_SECTION, 'stunnel_check_cert_validity', str(stunnel_check_cert_validity))
    return config

def _get_config():
    try:
        config = ConfigParser.SafeConfigParser()
    except AttributeError:
        config = ConfigParser()
    config.add_section(mount_efs.CONFIG_SECTION)
    return config

def _get_config(mode=None):
    try:
        config = ConfigParser.SafeConfigParser()
    except AttributeError:
        config = ConfigParser()
    config.add_section(mount_efs.CONFIG_SECTION)

    if mode is not None:
        config.set(mount_efs.CONFIG_SECTION, 'state_file_dir_mode', mode)

    return config

def _get_config():
    try:
        config = ConfigParser.SafeConfigParser()
    except AttributeError:
        config = ConfigParser()
    config.add_section(mount_efs.CONFIG_SECTION)
    config.set(mount_efs.CONFIG_SECTION, 'state_file_dir_mode', '750')
    return config

def read_config(config_file=CONFIG_FILE):
    try:
        p = ConfigParser.SafeConfigParser()
    except AttributeError:
        p = ConfigParser()
    p.read(config_file)
    return p

def read_config(config_file=CONFIG_FILE):
    try:
        p = ConfigParser.SafeConfigParser()
    except AttributeError:
        p = ConfigParser()
    p.read(config_file)
    return p