I had to convert a PHP form that has multiselect checkboxes with the same
name, splitting them into two or three columns of approximately equal
size.

    Chemistry

    ...

I made a CheckboxesWidget that's a cross between a RadiobuttonsWidget and
a MultipleSelectWidget, along with a columnizing function and a
columns-to-HTML-table function.  If anyone wants them or it would be
appropriate for quixote.widgets, I can make a patch.  (Otherwise y'all can
wait till I update my demo. :)

One irritation came up, another htmltext thing.  My HTML function looks
like this:

def htmlColumns(lis, delim="
\n"):
    """@param lis A list (each column) of lists (the items in the column).
       @param delim Placed between each item in the column.
       @return A one-row HTML table without borders.
    """
    #lis = [delim.join(columnList) for columnList in lis]
    cells = []
    for columnList in lis:
        columnList = [str(x) for x in columnList]
        cell = delim.join(columnList)
        cell = htmltext(cell)
        cells.append(cell)
    table = [cells]  # A one-row table.
    return htmlTable(table, standard=False, tableAttrs={})

The commented line fails because the columnlist elements are htmltext
rather than str.  The for-loop is to get around this.  I have to str()
each element and htmltext() the joined column.  Is there a shorter way to
do this without being obfuscating?