CentOS 7安裝Python3.6過程(讓linux系統共存Python2和Python3環境)

  CentOS 7系統自帶了python2,不過能夠不用2版本,直接使用python3運行python腳本就能夠,可是千萬別去動系統自帶的python2,由於有程序依賴目前的python2環境,好比yum,動了yum就沒法運行了,其餘有的程序也可能會受影響。明白了上面的,而後就來安裝Python3.6:html

安裝步驟:python

1. 安裝依賴環境

  # yum -y install zlib-devel bzip2-devel openssl-devel ncurses-devel sqlite-devel readline-devel tk-devel gdbm-devel db4-devel libpcap-devel xz-develsql

2.下載Python3

  https://www.python.org/downloads/vim

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# wget https://www.python.org/ftp/python/3.6.5/Python-3.6.5.tgz

3.安裝python3

  包安裝在/usr/local/Python3(具體安裝位置看我的喜愛)
  建立目錄:bash

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# mkdir -p /usr/local/Python3

  解壓下載好的Python-3.6.5.tgz包(具體包名因你下載的Python具體版本,我下載的是Python3.6.5這里就以Python-3.6.5.tgz爲例)spa

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# tar -zxvf Python-3.6.5.tgz

4.進入解壓後的目錄,編譯安裝

  若是編譯安裝過程有報錯提示看個人另外一個隨筆寫的解決辦法http://www.cnblogs.com/shwee/p/9013851.html3d

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# cd Python-3.6.5
# ./configure --prefix=/usr/local/Python3

  而後:makecode

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# make

  接着:make installsqlite

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# make install

  或者兩步一塊兒:make && make installhtm

5.安裝好了,創建python3的軟鏈

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# ln -s /usr/local/Python3/bin/python3 /usr/bin/python3

6.並將/usr/local/Python3/bin加入PATH

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# vim ~/.bash_profile
# .bash_profile
# Get the aliases and functions
if  - f ~ / .bashrc ]; then
. ~ / .bashrc
fi
# User specific environment and startup programs
PATH = $PATH:$HOME / bin : / usr / local /P ython3 / bin
export PATH

  按ESC,輸入:wq,按回車保存退出編輯。

  修改完記得執行行下面的命令,讓上一步的修改生效:

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# source ~/.bash_profile

  檢查Python3及pip3是否正常可用:

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# python3 -V
Python  3.6 .5
# pip3 -V
pip  9.0 .3  from  / usr / local /P ython3 / lib / python3. 6 / site - packages (python  3.6 )


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