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"""
public classes of Spark SQL:

    - L{SQLContext}
      Main entry point for SQL functionality.
    - L{DataFrame}
      A Resilient Distributed Dataset (RDD) with Schema information for the data contained. In
      addition to normal RDD operations, DataFrames also support SQL.
    - L{GroupedData}
    - L{Column}
      Column is a DataFrame with a single column.
    - L{Row}
      A Row of data returned by a Spark SQL query.
    - L{HiveContext}
      Main entry point for accessing data stored in Apache Hive..
"""

from pyspark.sql.context import SQLContext, HiveContext
from pyspark.sql.types import Row
from pyspark.sql.dataframe import DataFrame, GroupedData, Column, SchemaRDD

__all__ = [
    'SQLContext', 'HiveContext', 'DataFrame', 'GroupedData', 'Column', 'Row',
]