从DynamicFrame类中检索键的值? [英] Retrieve value for a key from DynamicFrame class?

问题描述

对于Python DynamicFrame，如何仅检索列值? 文档

For Python DynamicFrame, how to retrieve only column value? Documentation

dynamicFrame.show() # getting key and value, for eg: {"key1", "value1"}

但是我必须检索特定键的唯一值(例如"key1").

But I have to retrieve the only value for a particular key (say "key1").

推荐答案

该显示将显示列的值.如果您想要特定的键"， (我想您是指列的特定值)可以简单地做到:

The show display the column's values. If you want a specific "key" (I guess you mean a specific value for a column) you can simply do:

import pyspark.sql.functions as F

dynamicFrame.toDF().filter(F.col("mycol") == 'mykey').show()

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