code: def _handleParListMismatch(self, probStr, extra=False):
          
  
          errmsg = 'ERROR: mismatch between default and current par lists ' + \
                 'for task "'+self.taskName+'"'
          if probStr:
              errmsg += '\n\t'+probStr
          errmsg += '\n(try: "unlearn '+self.taskName+'")'
          print(errmsg)
          return False
docs: Handle the situation where two par lists do not match.
          This is meant to allow subclasses to override. Note that this only
          handles "missing" pars and "extra" pars, not wrong-type pars.