[jira] [Created] (SPARK-14605) Python spark.ml classes should use unicode uid

["Joseph K. Bradley (JIRA)" <ji...@apache.org>]

Joseph K. Bradley created SPARK-14605:
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             Summary: Python spark.ml classes should use unicode uid
                 Key: SPARK-14605
                 URL: https://issues.apache.org/jira/browse/SPARK-14605
             Project: Spark
          Issue Type: Improvement
          Components: ML, PySpark
            Reporter: Joseph K. Bradley
            Assignee: Joseph K. Bradley
            Priority: Minor


Python spark.ml Identifiable classes use UIDs of type {{str}}, but they should use {{unicode}} (in Python 2.x) to match Java.  This could be a problem if someone created a class in Java with odd unicode characters, saved it, and loaded it in Python.

This is also odd since the following code in Python produces a class {{lr}} with {{str}} uid and {{lr2}} with {{unicode}} uid:
{code}
from pyspark.ml.regression import LinearRegression
lr = LinearRegression(maxIter=1)
lr_path = "lr-TEMP"
lr.write.overwrite().save(lr_path)
lr2 = LinearRegression.load(lr_path)
{code}

Proposal: Use unicode everywhere in Python.



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