parameters: (self, event=None)
docstring: Clear all PT line services
docstring_summary: Clear all PT line services
docstring_tokens: Clear all PT line services
function: def on_clear_ptlines(self, event=None):
          """
          Clear all PT line services
          """
          self._demand.ptlines.clear()
          self._mainframe.browse_obj(self._demand.ptlines)
function_tokens: def on_clear_ptlines ( self , event = None ) : self . _demand . ptlines . clear ( ) self . _mainframe . browse_obj ( self . _demand . ptlines )