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https://issues.apache.org/jira/browse/SPARK-16700?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Davies Liu reassigned SPARK-16700:
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Assignee: Davies Liu
> StructType doesn't accept Python dicts anymore
> ----------------------------------------------
>
> Key: SPARK-16700
> URL: https://issues.apache.org/jira/browse/SPARK-16700
> Project: Spark
> Issue Type: Bug
> Components: PySpark
> Affects Versions: 2.0.0
> Reporter: Sylvain Zimmer
> Assignee: Davies Liu
>
> Hello,
> I found this issue while testing my codebase with 2.0.0-rc5
> StructType in Spark 1.6.2 accepts the Python <dict> type, which is very
> handy. 2.0.0-rc5 does not and throws an error.
> I don't know if this was intended but I'd advocate for this behaviour to
> remain the same. MapType is probably wasteful when your key names never
> change and switching to Python tuples would be cumbersome.
> Here is a minimal script to reproduce the issue:
> {code}
> from pyspark import SparkContext
> from pyspark.sql import types as SparkTypes
> from pyspark.sql import SQLContext
> sc = SparkContext()
> sqlc = SQLContext(sc)
> struct_schema = SparkTypes.StructType([
> SparkTypes.StructField("id", SparkTypes.LongType())
> ])
> rdd = sc.parallelize([{"id": 0}, {"id": 1}])
> df = sqlc.createDataFrame(rdd, struct_schema)
> print df.collect()
> # 1.6.2 prints [Row(id=0), Row(id=1)]
> # 2.0.0-rc5 raises TypeError: StructType can not accept object {'id': 0} in
> type <type 'dict'>
> {code}
> Thanks!
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