创建一个空的spark dataframe

from pyspark.sql.types import *
from pyspark.sql import SparkSession

spark = SparkSession.builder.appName('TEST').getOrCreate()
sc=spark.sparkContext
schema = StructType([
        StructField("a", IntegerType(), True),
        StructField("b", IntegerType(), True),
        StructField("c", IntegerType(), True)])
 
# 通过定义好的dataframe的schema来创建空dataframe
df1 = spark.createDataFrame(spark.sparkContext.emptyRDD(), schema)
df1.show()

　　想要创建一个空的spark dataframe，需要先指定schema 的类型

标签：创建,StructField,dataframe,IntegerType,spark,True,schema
来源： https://www.cnblogs.com/augustewsj/p/15479872.html