Davies Liu 5d8f7b9e87 [SPARK-6677] [SQL] [PySpark] fix cached classes ... It's possible to have two DataType object with same id (memory address) at different time, we should check the cached classes to verify that it's generated by given datatype. This PR also change `__FIELDS__` and `__DATATYPE__` to lower case to match Python code style. Author: Davies Liu <davies@databricks.com> Closes #5445 from davies/fix_type_cache and squashes the following commits: 63b3238 [Davies Liu] typo 47bdede [Davies Liu] fix cached classes		2015-04-11 22:33:23 -07:00
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docs	[SPARK-6264] [MLLIB] Support FPGrowth algorithm in Python API	2015-04-09 15:10:10 -07:00
lib	[SPARK-2305] [PySpark] Update Py4J to version 0.8.2.1	2014-07-29 19:02:06 -07:00
pyspark	[SPARK-6677] [SQL] [PySpark] fix cached classes	2015-04-11 22:33:23 -07:00
test_support	[SPARK-3634] [PySpark] User's module should take precedence over system modules	2014-09-24 12:10:09 -07:00
.gitignore	[SPARK-3946] gitignore in /python includes wrong directory	2014-10-14 14:09:39 -07:00
run-tests	[SPARK-6211][Streaming] Add Python Kafka API unit test	2015-04-09 23:14:24 -07:00