parameters: (self, itr, val)
docstring: Sets the value of child corresponding to itr
docstring_summary: Sets the value of child corresponding to itr
docstring_tokens: Sets the value of child corresponding to itr
function: def __setitem__(self, itr, val):
          """
          Sets the value of child corresponding to itr
          """
          self.param[itr] = val
function_tokens: def __setitem__ ( self , itr , val ) : self . param [ itr ] = val