code: def setParam(self, name, val, scope='', check=1, idxHint=None):
          
          theDict, oldVal = findScopedPar(self, scope, name)
  
          # Set the value, even if invalid.  It needs to be set before
          # the validation step (next).
          theDict[name] = val
  
          # If need be, check the proposed value.  Ideally, we'd like to
          # (somehow elegantly) only check this one item. For now, the best
          # shortcut is to only validate this section.
          if check:
              ans=self.validate(self._vtor, preserve_errors=True, section=theDict)
              if ans != True:
                  flatStr = "All values are invalid!"
                  if ans != False:
                      flatStr = flattened2str(configobj.flatten_errors(self, ans))
                  raise RuntimeError("Validation error: "+flatStr)
  
          # Note - this design needs work.  Right now there are two copies
          # of the data:  the ConfigObj dict, and the __paramList ...
          # We rely on the idxHint arg so we don't have to search the __paramList
          # every time this is called, which could really slows things down.
          assert idxHint is not None, "ConfigObjPars relies on a valid idxHint"
          assert name == self.__paramList[idxHint].name, \
                 'Error in setParam, name: "'+name+'" != name at idxHint: "'+\
                 self.__paramList[idxHint].name+'", idxHint: '+str(idxHint)
          self.__paramList[idxHint].set(val)
docs: Find the ConfigObj entry.  Update the __paramList.