code: def clear(self):
          
          dict.clear(self)
          self.scalars = []
          self.sections = []
          self.comments = {}
          self.inline_comments = {}
          self.configspec = None
          self.defaults = []
          self.extra_values = []
docs: A version of clear that also affects scalars/sections
          Also clears comments and configspec.
  
          Leaves other attributes alone :
              depth/main/parent are not affected