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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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Sylvain Zimmer updated SPARK-16700:
-----------------------------------
Description:
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!
was:
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:python}
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!
> 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, Spark Core
> Affects Versions: 2.0.0
> Reporter: Sylvain Zimmer
>
> 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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