parameters: (self, index)
return_statement: return self.tk.call(self._w, 'mark', 'previous', index) or None
docstring: Return the name of the previous mark before INDEX.
docstring_summary: Return the name of the previous mark before INDEX.
docstring_tokens: Return the name of the previous mark before INDEX .
function: def mark_previous(self, index):
          """Return the name of the previous mark before INDEX."""
          return self.tk.call(self._w, 'mark', 'previous', index) or None
function_tokens: def mark_previous ( self , index ) : return self . tk . call ( self . _w , 'mark' , 'previous' , index ) or None