spark-instrumented-optimizer/python/pyspark/shell.py

#
# Licensed to the Apache Software Foundation (ASF) under one or more
# contributor license agreements.  See the NOTICE file distributed with
# this work for additional information regarding copyright ownership.
# The ASF licenses this file to You under the Apache License, Version 2.0
# (the "License"); you may not use this file except in compliance with
# the License.  You may obtain a copy of the License at
#
#    http://www.apache.org/licenses/LICENSE-2.0
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# distributed under the License is distributed on an "AS IS" BASIS,
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"""
An interactive shell.

This file is designed to be launched as a PYTHONSTARTUP script.
"""
import os
import pyspark
from pyspark.context import SparkContext


sc = SparkContext(os.environ.get("MASTER", "local"), "PySparkShell")
print "Spark context avaiable as sc."

# The ./pyspark script stores the old PYTHONSTARTUP value in OLD_PYTHONSTARTUP,
# which allows us to execute the user's PYTHONSTARTUP file:
_pythonstartup = os.environ.get('OLD_PYTHONSTARTUP')
if _pythonstartup and os.path.isfile(_pythonstartup):
    execfile(_pythonstartup)