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我试图执行提供的基本示例推断使用反射的架构 Apache SPARK文档的一部分。Apache SPARK与SQLContext :: IndexError
我对Cloudera的快速启动VM(CDH5)
我想执行的例子这样做是如下::
# sc is an existing SparkContext.
from pyspark.sql import SQLContext, Row
sqlContext = SQLContext(sc)
# Load a text file and convert each line to a Row.
lines = sc.textFile("/user/cloudera/analytics/book6_sample.csv")
parts = lines.map(lambda l: l.split(","))
people = parts.map(lambda p: Row(name=p[0], age=int(p[1])))
# Infer the schema, and register the DataFrame as a table.
schemaPeople = sqlContext.createDataFrame(people)
schemaPeople.registerTempTable("people")
# SQL can be run over DataFrames that have been registered as a table.
teenagers = sqlContext.sql("SELECT name FROM people WHERE age >= 13 AND age <= 19")
# The results of SQL queries are RDDs and support all the normal RDD operations.
teenNames = teenagers.map(lambda p: "Name: " + p.name)
for teenName in teenNames.collect():
print(teenName)
我跑的代码完全如上面一样,但当我执行最后一个命令(for循环)时,总是收到错误“IndexError:列表索引超出范围”。
输入文件book6_sample可在 book6_sample.csv。
我完全按照上面所示运行代码,但是当我执行最后一个命令(for循环)时,总是收到错误“IndexError:list index out of range”。
请指出我要出错的地方。
在此先感谢。
问候, 斯里兰卡
嘿萨钦,这没有工作在提出改变之后。谢谢 – Sri