pyspark.sql.functions.lit(col)

Creates a Column of literal value

代码示例：

from pyspark.sql import SparkSession,functions as F

def main():
    spark=SparkSession.builder.appName("ade_als_related").getOrCreate()
    df=spark.createDataFrame([('1992-7-8',),('1997-9-10',)],['d'])

    # 
    df1=df.select(F.col("d"),F.lit(5).alias("heigth")).withColumn("spark_user",F.lit(True))
    df1.show()

if __name__ == '__main__':
    main()

运行结果：