Spark sortByKey算子学习使用详解
作者:高景洋 日期:2020-10-25 11:32:54 浏览次数:1676
sortByKey:
按Key进行排序
示例代码:
def my_sortByKey(): data = ['hello spark', 'hello world', 'hello world'] rdd = sc.parallelize(data) map_rdd = rdd.flatMap(lambda line: line.split(' ')).map(lambda x: (x, 1)) reduce_by_key = map_rdd.reduceByKey(lambda a,b:a+b) sort_by_rdd = reduce_by_key.map(lambda x:(x[1],x[0]))
print(sort_by_rdd.sortByKey().map(lambda x:(x[1],x[0])).collect())
输出结果:
[('spark', 1), ('world', 2), ('hello', 3)]
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