old_contents: from pyspark import SparkContext, SparkConf
  
  sc = SparkContext(appName="Elevation Parquet Converter")
  sqlContext = SQLContext(sc)
  
  df = spark.read.csv("dem3/*.csv")
  df.write.parquet("elevation.parquet")
  
new_contents: from pyspark.sql import SparkSession
  
  spark = SparkSession \
      .builder \
      .appName("Elevation Parquet Converter") \
      .getOrCreate()
  
  df = spark.read.csv("dem3/*.csv")
  df.write.parquet("elevation.parquet")
  
subject: Fix Imports and setup