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import os
import sys
from pyspark.storagelevel import StorageLevel
sys.path.append(os.path.dirname(sys.path[0])) # 上级目录
from utils.templates import Templates
# from ..utils.templates import Templates
# from AmazonSpider.pyspark_job.utils.templates import Templates
from pyspark.sql.types import StringType
# 分组排序的udf窗口函数
from pyspark.sql.window import Window
from pyspark.sql import functions as F
class UsAsinImage(Templates):
def __init__(self):
super().__init__()
self.site_name = "uk"
self.db_save = f"tmp_asin_image_lzo"
self.spark = self.create_spark_object(app_name=f"{self.db_save}: {self.site_name}")
self.df_save = self.spark.sql(f"select 1+1;")
self.df1 = self.spark.sql(f"select 1+1;")
self.df2 = self.spark.sql(f"select 1+1;")
self.df = self.spark.sql(f"select 1+1;")
self.partitions_by = ['site_name']
self.reset_partitions(partitions_num=1)
def read_data(self):
sql1 = f"""
select
*,
1 as flag
from
tmp_asin_image_copy
where
site_name = 'us14'
limit 10;
"""
sql2 = f"""
select
*,
2 as flag
from
tmp_asin_image_copy
where
site_name = 'us6'
limit 10;
"""
self.df1 = self.spark.sql(sqlQuery=sql1).cache()
self.df2 = self.spark.sql(sqlQuery=sql2).cache()
self.df = self.df1.unionAll(self.df2)
df_window = Window.partitionBy(["asin"]).orderBy(self.df.flag.desc())
self.df = self.df.withColumn("rk",F.dense_rank().over(window=df_window))
self.df_save = self.df.filter("rk = 1")
self.df_save.withColumn("site_name",F.lit("us"))
self.df_save = self.df_save.drop("flag").drop("rk").show()
if __name__ == "__main__":
obj = UsAsinImage()
obj.read_data()