def uniform(record_list):
    """Generate uniform abundance distribution from a number of records

    Args:
        record_list (list): a list of record.id

    Returns:
        dict: a dictionary with records as keys, abundance as values
    """
    abundance_dic = {}
    n_records = len(record_list)
    for record in record_list:
        abundance_dic[record] = 1 / n_records
    return abundance_dic
