pyspark设置python的版本

liuf2@liuf2-virtual-machine ~/a/s/bin> ./pyspark                                                                                                     
Python 2.7.15rc1 (default, Nov 12 2018, 14:31:15)                                                                                                    
[GCC 7.3.0] on linux2                                                                                                                                
Type "help", "copyright", "credits" or "license" for more information.                                                                               
2019-03-26 23:57:06 WARN  Utils:66 - Your hostname, liuf2-virtual-machine resolves to a loopback address: 127.0.1.1; using 192.168.124.129 instead (o
n interface ens33)                                                                                                                                   
2019-03-26 23:57:06 WARN  Utils:66 - Set SPARK_LOCAL_IP if you need to bind to another address                                                       
2019-03-26 23:57:07 WARN  NativeCodeLoader:62 - Unable to load native-hadoop library for your platform... using builtin-java classes where applicable
Setting default log level to "WARN".                                                                                                                 
To adjust logging level use sc.setLogLevel(newLevel). For SparkR, use setLogLevel(newLevel).                                                         
Welcome to                                                                                                                                           
      ____              __                                                                                                                           
     / __/__  ___ _____/ /__                                                                                                                         
    _ / _ / _ `/ __/  '_/                                                                                                                         
   /__ / .__/\_,_/_/ /_/\_   version 2.4.0                                                                                                          
      /_/                                                                                                                                            
                                                                                                                                                     
Using Python version 2.7.15rc1 (default, Nov 12 2018 14:31:15)                                                                                       
SparkSession available as 'spark'.                                                                                                                   
>>> exit() 

这是我启动spark后的输出信息， 我尝试更改spark默认版本

1.   对以下文件进行编辑

liuf2@liuf2-virtual-machine ~/a/s/conf> vim spark-env.sh.template
liuf2@liuf2-virtual-machine ~/a/s/conf> mv spark-env.sh.template spark-env.sh
liuf2@liuf2-virtual-machine ~/a/s/conf> vim spark-env.sh

在底部添加
export PYSPARK_PYTHON=/usr/bin/python3

2.  在spark的bin目录下进行以下编辑

liuf2@liuf2-virtual-machine ~/a/s/bin> vim pyspark
PYSPARK_PYTHON=python 

修改为

PYSPARK_PYTHON=python3

# Determine the Python executable to use for the executors:
if [[ -z "$PYSPARK_PYTHON" ]]; then
  if [[ $PYSPARK_DRIVER_PYTHON == *ipython* && ! $WORKS_WITH_IPYTHON ]]; then
    echo "IPython requires Python 2.7+; please install python2.7 or set PYSPARK_PYTHON" 1>&2
    exit 1
  else
    PYSPARK_PYTHON=python3
  fi
fi
export PYSPARK_PYTHON

3. 重新启动pyspark

liuf2@liuf2-virtual-machine ~/a/s/bin> ./pyspark
Python 3.6.7 (default, Oct 22 2018, 11:32:17)
[GCC 8.2.0] on linux
Type "help", "copyright", "credits" or "license" for more information.
2019-03-27 00:02:00 WARN  Utils:66 - Your hostname, liuf2-virtual-machine resolves to a loopback address: 127.0.1.1; using 192.168.124.129 instead (on interface ens33)
2019-03-27 00:02:00 WARN  Utils:66 - Set SPARK_LOCAL_IP if you need to bind to another address
2019-03-27 00:02:00 WARN  NativeCodeLoader:62 - Unable to load native-hadoop library for your platform... using builtin-java classes where applicable
Setting default log level to "WARN".
To adjust logging level use sc.setLogLevel(newLevel). For SparkR, use setLogLevel(newLevel).
Welcome to
      ____              __
     / __/__  ___ _____/ /__
    _ / _ / _ `/ __/  '_/
   /__ / .__/\_,_/_/ /_/\_   version 2.4.0
      /_/

Using Python version 3.6.7 (default, Oct 22 2018 11:32:17)
SparkSession available as 'spark'.