Python下Spark输出pair RDD

from pyspark.sql import SparkSession

spark = SparkSession.builder.master('local').appName("test_script").getOrCreate()
sc = spark.sparkContext

lines = sc.parallelize({(1,2), (3,4), (3,6)})
res = lines.groupByKey().collect()
print(sorted([(x, sorted(y)) for (x, y) in res])) # 第一个sorted是确保按照key顺序输出，第二个是让value显示出来，不加就无法显示