Github user asfgit closed the pull request at:
https://github.com/apache/spark/pull/13540
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GitHub user zjffdu opened a pull request:
https://github.com/apache/spark/pull/13540
[SPARK-15788][PYSPARK][ML] PySpark IDFModel missing "idf" property
## What changes were proposed in this pull request?
add method idf to IDF in pyspark
## How was this patch
