parameters: (self, key, value)
docstring: Add a new value to the list of values for this key.
docstring_summary: Add a new value to the list of values for this key.
docstring_tokens: Add a new value to the list of values for this key .
function: def append(self, key, value):
          ''' Add a new value to the list of values for this key. '''
          self.dict.setdefault(key, []).append(value)
function_tokens: def append ( self , key , value ) : self . dict . setdefault ( key , [ ] ) . append ( value )