def __init__(self, line_number, row, expected_length):
        msg = 'Expected %i columns, found %i columns' % (expected_length, len(row))
        super(LengthMismatchError, self).__init__(line_number, row, msg)
dataset/ETHPy150Open wireservice/csvkit/csvkit/exceptions.py/LengthMismatchError.__init__/original