【Python】python2.7升级到python3.x，最新方式

• python升级前期工作一定准备好。要不然后续pip升级都是问题。

1.openssl安装

cd /usr/local

wget https://www.openssl.org/source/openssl-3.0.2.tar.gz --no-check-certificate

tar -zxvf openssl-3.0.2.tar.gz

2.安装openssl

cd openssl-3.0.2
./Configure --prefix=/usr/local/openssl

• 如果出现如下内容直接跳到第三步
  
• 原因是因为缺少IPC/Cmd.pm模块，需要安装这个模块安装 perl-CPAN

yum install -y perl-CPAN
 perl -MCPAN -e shell

进入perl shell中：如下图，选择yes->manual->yes即可。

make && make install

• 拷贝文件

 cp -rf /usr/local/openssl/lib64 /usr/local/openssl/lib

3.python安装

• 下载

wget https://www.python.org/ftp/python/3.11.2/Python-3.11.2.tgz

• 解压

tar -xvf Python-3.11.2.tgz

sudo 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 libffi-devel

• 进行配置

./configure --prefix=/usr/local/python3 --with-openssl=/usr/local/openssl --with-openssl-rpath=auto

• 编译

make -j

• 配置软链

rm -rf /usr/bin/python
rm -rf /usr/bin/pip
ln -s /usr/local/python3/bin/python3.11 /usr/bin/python
ln -s /usr/local/python3/bin/pip3.11 /usr/bin/pip