5.1 PySpark 功能:Apache Spark的Python API,适合分布式数据处理。 示例代码:Python复制from pyspark.sql import SparkSession spark = SparkSession.builder.appName("ETL").getOrCreate() df = spark.read.csv('data.csv', inferSchema=True) df.dropDuplicates().write.csv('output.csv') 总结Python提供了丰富...
Learn how to load and transform data using the Apache Spark Python (PySpark) DataFrame API, the Apache Spark Scala DataFrame API, and the SparkR SparkDataFrame API in Databricks.
Step 1: Define variables and load CSV file This step defines variables for use in this tutorial and then loads a CSV file containing baby name data fromhealth.data.ny.govinto yourUnity Catalogvolume. Open a new notebook by clicking the ...
/usr/bin/env python import sys import random import time def genRand(s = 10000): return random.randint(1,s) def getLine(cols = 10): tpl = "%s\t" line = "" for x in range(int(cols) -1): line = line + tpl % genRand(x + 10) line = line + str(genRand(int(cols) + 10...
pyspark读写hdfs,parquet文件 df: 智能推荐 路由器接口及静态路由配置 1、网络拓扑构建。添加一台路由器,带2个FastEthernet接口,添加2台PC机,用交叉双绞线将PC机分别与两个FastEthernet口连接。如下图所示。 2、分别为PC1、PC2、F0/0、F0/1规划IP地址及子网掩码。原则是:PC1与F0/0应该属于同一网段;PC2与F0/...
Traceback (most recent call last): File "<stdin>", line 1, in <module> File "/Users/yuqi/venv/lib/python3.9/site-packages/pyspark/sql/readwriter.py", line 955, in csv self._jwrite.csv(path) File "/Users/yuqi/venv/lib/python3.9/site-packages/py4j/java_gateway.py", line 1309, in...
Run SQL queries in PySpark See alsoApache Spark PySpark API reference. Scala Define variables and copy public data into a Unity Catalog volume Create a DataFrame with Scala Load data into a DataFrame from CSV file View and interacting with a DataFrame ...
>>> from pyspark.sql import HiveContext >>> hiveContext = HiveContext(sc) >>> jsonDF = hiveContext.read.json('file:///home/bdp/My_Work_Book/Spark/jsondata.json') Here, I have imported JSON library to parse JSON file. I am creating HiveContext from the SparkContext. In the last ...
In this test, the data was loaded from a CSV file located on Azure Data Lake Storage Gen 2. The CSV file size is 27 GB having 110 M records with 36 columns. This is a custom data set with random data. A typical high-level architecture of Bulk ingestio...
MongoDB Spark连接器py4j.protocol.Py4JJavaError：调用o50.load时出错我找到了问题的答案。这是Mongo-...