我正在嘗試使用 pyspark 數據幀讀取 JSON 列表。您將在下面找到我的輸入數據，我的目標是獲取具有兩列 user (string ) 和 ips Array[Sting] 的數據框。sampleJson = [ ('{"user":100, "ips" : ["191.168.192.101", "191.168.192.103", "191.168.192.96", "191.168.192.99"]}',), ('{"user":101, "ips" : ["191.168.192.102", "191.168.192.105", "191.168.192.103", "191.168.192.107"]}',), ('{"user":102, "ips" : ["191.168.192.105", "191.168.192.101", "191.168.192.105", "191.168.192.107"]}',), ('{"user":103, "ips" : ["191.168.192.96", "191.168.192.100", "191.168.192.107", "191.168.192.101"]}',), ('{"user":104, "ips" : ["191.168.192.99", "191.168.192.99", "191.168.192.102", "191.168.192.99"]}',), ('{"user":105, "ips" : ["191.168.192.99", "191.168.192.99", "191.168.192.100", "191.168.192.96"]}',), ]感謝您的幫助。
1 回答
汪汪一只貓
TA貢獻1898條經驗 獲得超8個贊
使用from_json函數通過defining schema.
Example:
from pyspark.sql.functions import *
from pyspark.sql.types import *
sampleJson = [ ('{"user":100, "ips" : ["191.168.192.101", "191.168.192.103", "191.168.192.96", "191.168.192.99"]}',), ('{"user":101, "ips" : ["191.168.192.102", "191.168.192.105", "191.168.192.103", "191.168.192.107"]}',), ('{"user":102, "ips" : ["191.168.192.105", "191.168.192.101", "191.168.192.105", "191.168.192.107"]}',), ('{"user":103, "ips" : ["191.168.192.96", "191.168.192.100", "191.168.192.107", "191.168.192.101"]}',), ('{"user":104, "ips" : ["191.168.192.99", "191.168.192.99", "191.168.192.102", "191.168.192.99"]}',), ('{"user":105, "ips" : ["191.168.192.99", "191.168.192.99", "191.168.192.100", "191.168.192.96"]}',), ]
df1=spark.createDataFrame(sampleJson)
sch=StructType([StructField('user', StringType(), False),StructField('ips',ArrayType(StringType()))])
df1.withColumn("n",from_json(col("_1"),sch)).select("n.*").show(10,False)
#+----+--------------------------------------------------------------------+
#|user|ips |
#+----+--------------------------------------------------------------------+
#|100 |[191.168.192.101, 191.168.192.103, 191.168.192.96, 191.168.192.99] |
#|101 |[191.168.192.102, 191.168.192.105, 191.168.192.103, 191.168.192.107]|
#|102 |[191.168.192.105, 191.168.192.101, 191.168.192.105, 191.168.192.107]|
#|103 |[191.168.192.96, 191.168.192.100, 191.168.192.107, 191.168.192.101] |
#|104 |[191.168.192.99, 191.168.192.99, 191.168.192.102, 191.168.192.99] |
#|105 |[191.168.192.99, 191.168.192.99, 191.168.192.100, 191.168.192.96] |
#+----+--------------------------------------------------------------------+
#schema
df1.withColumn("n",from_json(col("_1"),sch)).select("n.*").printSchema()
#root
# |-- user: string (nullable = true)
# |-- ips: array (nullable = true)
# | |-- element: string (containsNull = true)
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