centos7安裝python3

1.下載python3.6,下載目錄:/usr/local/src

cd /usr/local/src

wget https://www.python.org/ftp/python/3.6.1/Python-3.6.1.tar.xz

2.解壓Python-3.6.1.tar.xz

xz -d Python-3.6.1.tar.xz

tar -xf Python-3.6.1.tar

3.進入解壓好的目錄Python-3.6.1,編譯安裝python3.6,安裝目錄:/usr/local/python3

mkdir /usr/local/python3

cd Python-3.6.1

./configure --prefix=/usr/local/python3

make && make install

到此python3安裝完畢!

4.讓系統默認使用python3,由於linux下自帶的是python2版本

cd /usr/bin

rm -rf python

ln -s /usr/local/python3/bin/python3 /usr/bin/python

5.修改yum文件,由於yum使用python2

vim /usr/bin/yum

把文件頭部的#!/usr/bin/python改爲#!/usr/bin/python2.7保存退出便可

修改/usr/libexec/urlgrabber-ext-down文件

vim /usr/libexec/urlgrabber-ext-down

把文件頭部的#!/usr/bin/python改爲#!/usr/bin/python2.7保存退出便可

6.配置pip3,由於系統默認的仍是pip

rm -rf /usr/bin/pip3

ln -s /usr/local/python3/bin/pip3 /usr/bin/pip3

7.解決centos下 No module named '_sqlite3',切換到Python3的下載目錄,安裝sqlite-devel,再從新編譯安裝一下python3便可

yum install sqlite-devel

cd /usr/local/src/Python-3.6.1

./configure --prefix=/usr/local/python3

make && make install

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