def label(self, value):
        """
        Set the label and generate the formatted value
        @type   value:      str
        """
        # Fixed width label formatting
        value = value[:self.pad_size] if self.pad_size else value
        try:
            padding = ' ' * (self.pad_size - len(value)) if self.pad_size else ''
        except TypeError:
            padding = ''

        self._formatted = ' {v}{p} '.format(v=value, p=padding)
Set the label and generate the formatted value
        @type   value:      str