code: def docstr(self, prefix='', include_label=True):
          
          outstr = "%s%s : {%s, %s}\n" %(prefix, self.name, str(self.default),
              str(self.dtype).replace("<type '", '').replace("'>", '')) + \
              "%s    %s" %(prefix, self.description)
          if include_label:
              outstr += " Label: %s" %(self.label)
          return outstr
docs: Returns a string summarizing the parameter. Format is:
          <prefix>``name`` : {``default``, ``dtype``}
          <prefix>   ``description`` Label: ``label``.