def delete_sql(table, filter):
    '''
    >>> delete_sql('tbl', {'foo': 10, 'bar': 'baz'})
    ('DELETE FROM tbl WHERE bar=$1 AND foo=$2', ['baz', 10])
    '''
    keys, values = _split_dict(filter)
    where = _pairs(keys)
    sql = 'DELETE FROM {} WHERE {}'.format(table, where)
    return sql, values