how to add column in spark code example

Example 1: spark add column to dataframe

from pyspark.sql.functions import lit

df = sqlContext.createDataFrame(
    [(1, "a", 23.0), (3, "B", -23.0)], ("x1", "x2", "x3"))

df_with_x4 = df.withColumn("x4", lit(0))
df_with_x4.show()

Example 2: spark dataframe add column with function

val myDF = sqlContext.parquetFile("hdfs:/to/my/file.parquet")

myDF.withColumn("Code", coder(myDF("Amt")))