Wrapper for get symbol for train

    Parameters
    ----------
    network : str
        name for the base network symbol
    data_shape : int
        input shape
    kwargs : dict
        see symbol_builder.get_symbol_train for more details

def get_symbol_train(network, data_shape, **kwargs):
    """Wrapper for get symbol for train

    Parameters
    ----------
    network : str
        name for the base network symbol
    data_shape : int
        input shape
    kwargs : dict
        see symbol_builder.get_symbol_train for more details
    """
    if network.startswith('legacy'):
        logging.warn('Using legacy model.')
        return symbol_builder.import_module(network).get_symbol_train(**kwargs)
    config = get_config(network, data_shape, **kwargs).copy()
    config.update(kwargs)
    return symbol_builder.get_symbol_train(**config)