centos7中安裝python3

1.安裝相應的編譯工具

在root用戶下(不要用普通用戶,麻煩),全部復制粘貼過去,一次性安裝即可.

yum -y groupinstall "Development tools" yum -y install zlib-devel bzip2-devel openssl-devel ncurses-devel sqlite-devel readline-devel tk-devel gdbm-devel db4-devel libpcap-devel xz-devel yum install -y libffi-devel zlib1g-dev yum install zlib* -y

2.下載安裝包

wget wget https://www.python.org/ftp/python/3.7.2/Python-3.7.2.tar.xz

3.解壓

tar -xvJf Python-3.7.2.tar.xz

4.創建編譯安裝目錄

mkdir /usr/local/python3 

5.安裝

cd Python-3.7.2 ./configure --prefix=/usr/local/python3 --enable-optimizations --with-ssl #第一個指定安裝的路徑,不指定的話,安裝過程中可能軟件所需要的文件復制到其他不同目錄,刪除軟件很不方便,復制軟件也不方便. #第二個可以提高python10%-20%代碼運行速度. #第三個是為了安裝pip需要用到ssl,后面報錯會有提到. make && make install

what-does-enable-optimizations-do-while-compiling-python

6.創建軟鏈接

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

7.驗證是否成功

python3 -V pip3 -V