如何使用spark

Question

我是spark的新手，请假定我具有如下数据框

sensor       description
541163       PLC27.8Y.8Y35.Duration_R2_EquipmentDownCondition 
541163   PLC27.8Y.8Y35.Duration_R2_EquipmentDownCondition 
541163   PLC27.8Y.8Y35.Duration_R2_EquipmentDownCondition 
541163   PLC27.MIS_PLC27.8Y.8Y35.Duration_R2_EquipmentDownCondition 
541163   PLC27.MIS_PLC27.8Y.8Y35.Duration_R2_EquipmentDownCondition 
327036   PLC12.MIS_PLC12.6X.6x60.Duration_ST_CyclingCondition      
327041   PLC12.MIS_PLC12.6X.6x60.Duration_ST_TotalCycleCondition   
327036   PLC12.MIS_PLC12.6X.6x60.Duration_ST_CyclingCondition      
541142   PLC12.MIS_PLC12.6X.6x60.Duration_ST_DownCondition         
327036   PLC12.MIS_PLC12.6X.6x60.Duration_ST_CyclingCondition      

我想从description列中创建新列：

• 如果description包含"DownCondition"，请返回0
• 如果存在CyclingCondition，请返回1
• 如果存在EquipmentDownCondition，请返回2