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並前往https://spark.apache.org/docs/latest/api/python/reference/api/pyspark.RDD.keys.html

pyspark.RDD.keys - Apache Spark

RDD. keys () → pyspark.rdd. ... Return an RDD with the keys of each tuple. ... rdd = sc.parallelize([(1, 2), (3, 4)]).keys() >>> rdd.collect() [1, 3].

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