I just started to learn the spark, create a separate application, met the wrong ImportErrorn: always import a name SparkConf. Below is the specific error screenshots and my code, in addition, my spark is run in their structures, hadoop cluster nodes (3), initialize SparkContext this part I is baidu, don't know setMaster this place to write right, part of the initialization, there is no problem I run on PySpark shells, screenshot below, great god, please give directions!!!!!