return [(name, func(value)) for name, value in items]

def cast(type_, val):

    try: return type_(val)

def conv_items(type_, items):

    return map_items(lambda val: cast(type_, val),

    items = list(items)

    items.sort()

    try: return items[0][1] # value of lowest-numbered item

funcs['_alt'] = _alt

def _merge(items):

    try: new_value = repls[value]

    except KeyError, e:

        # Save traceback right away in case another exception raised

        try: new_value = repls['*']

    if new_value == '*': new_value = value # '*' means keep input value the same

    return new_value

            if action == 'default': units.set_default_units(quantity, units_)

            elif action == 'to':

                try: quantity = units.convert(quantity, units_)

            else: raise SyntaxException(ValueError('Invalid action: '+action))

    return units.quantity2str(quantity)

funcs['_units'] = _units

def _noCV(items):

    try: name, value = items.next()

    except StopIteration: return None

    return value

funcs['_noCV'] = _noCV

        try: items['year']

        except KeyError, e:

            if items == {}: return None # entire date is empty

        # Convert month name to number

        try: month = items['month']

        else:

            if not month.isdigit(): # month is name

                try: items['month'] = str(dates.strtotime(month).month)

        items = dict(conv_items(format.str2int, items.iteritems()))

        items.setdefault('month', 1)

                date = datetime.date(**items)

                break

            except ValueError, e:

                    # exception still raised after retry

                msg = strings.ustr(e)

                if msg == 'month must be in 1..12': # try swapping month and day

                    items['month'], items['day'] = items['day'], items['month']

    else:

        try: year = float(str_)

        except ValueError:

            try: date = dates.strtotime(str_)

            except ImportError: return str_

        else: date = (datetime.date(int(year), 1, 1) +

            datetime.timedelta(round((year % 1.)*365)))

    try: return dates.strftime('%Y-%m-%d', date)