Apache spark 在Pyspark数据帧中的多列上执行函数
我必须在Pyspark dataframe中的多列上应用某些函数。下面是我的代码:Apache spark 在Pyspark数据帧中的多列上执行函数,apache-spark,pyspark,apache-spark-sql,pyspark-dataframes,Apache Spark,Pyspark,Apache Spark Sql,Pyspark Dataframes,我必须在Pyspark dataframe中的多列上应用某些函数。下面是我的代码: finaldf=df.withColumn('phone_number',regexp_replace("phone_number","[^0-9]",""))\ .withColumn('account_id',regexp_replace("account_id","[^0-9]","&quo
finaldf=df.withColumn('phone_number',regexp_replace("phone_number","[^0-9]",""))\
.withColumn('account_id',regexp_replace("account_id","[^0-9]",""))\
.withColumn('credit_card_limit',regexp_replace("credit_card_limit","[^0-9]",""))\
.withColumn('credit_card_number',regexp_replace("credit_card_number","[^0-9]",""))\
.withColumn('full_name',regexp_replace("full_name","[^a-zA-Z ]",""))\
.withColumn('transaction_code',regexp_replace("transaction_code","[^a-zA-Z]",""))\
.withColumn('shop',regexp_replace("shop","[^a-zA-Z ]",""))
finaldf=finaldf.filter(finaldf.account_id.isNotNull())\
.filter(finaldf.phone_number.isNotNull())\
.filter(finaldf.credit_card_number.isNotNull())\
.filter(finaldf.credit_card_limit.isNotNull())\
.filter(finaldf.transaction_code.isNotNull())\
.filter(finaldf.amount.isNotNull())
从代码中你可以看到我写的冗余代码也扩展了程序的长度。我还了解到spark UDF效率不高
有没有办法优化这段代码?请让我知道。非常感谢 对于多个过滤器,您应该这样做
filter_cols= ['account_id','phone_number','credit_card_number','credit_card_limit','transaction_code','amount']
final_df.filter(' and '.join([x+' is not null' for x in filter_cols]))
您可以将所有这些条件放在一条语句中:
.filter(finaldf.account\u id.isNotNull()&finaldf.phone\u number.isNotNull()&…
好的,谢谢!有没有一种方法可以使用单个循环来完成所有这些常见的功能?非常感谢您的帮助!我得到了结果。“and”是否会导致使用该“x+”执行多个筛选条件?是的,您可以只打印”and“。加入([x+”在filter\u cols中对于x不是null])
以检查它提供的sql表达式非常感谢!