spark学习---hello world

《spark入门学习》

1. 下载spark

http://archive.apache.org/dist/spark/spark-2.4.4/

2. 解压spark-2.4.4-bin-hadoop2.7.tgz 到 /Users/yyc121/software/

3. 配置pyspark全局变量

　　3.1 vim ~/.bash_profile

　　3.2 增加：alias pyspark="/Users/yyc121/software/spark-2.4.4-bin-hadoop2.7/bin/pyspark" 

4. 验证pyspark安装完成，输入pyspark

5. 将/Users/yyc121/software/spark-2.4.4-bin-hadoop2.7/bin/目录下的pyspark，拷贝到python 的site-packages目录下

6. 配置pycharm python解释器，运行环境配置

6.1 python解释器配置

 6.2 运行环境配置

  

7. 写个统计词频脚本，测试

helloword.py

# -*- coding: utf-8 -*-
import sys
from pyspark import SparkContext
from operator import add
import  re

def main():
    sc = SparkContext(appName= "wordsCount")
    lines = sc.textFile('words.txt')
    counts = lines.flatMap(lambda  x: x.split(' '))
                .map( lambda  x : (x, 1))
                .reduceByKey(add)
    output = counts.collect()
    print(output)
    for (word, count) in output:
        print ("%s: %i" %(word, count))

    sc.stop()

if __name__ =="__main__":
    main()

words.txt

The dynamic lifestyle
people lead nowadays
causes many reactions
in our bodies and
the one that is the
most frequent of all
is the headache

7. pycharm直接运行

8. 结果展示