def or_condition(field, op, seq):
    """ Return an 'or' condition of the format:
    ((field, ('op seq[0]', 'op seq[1]'...), )

    Example
    -------
    >>> or_condition('tag', 'has', ('Web', 'Case Study', 'Testing'))
    >>> ('tag', ('has Web', 'has Case Study', 'has Testing'),
    """
    return ((field, tuple(["{} {}".format(op, tag) for tag in seq])),)