centos升级python3.10，中间遇到问题，终于解决了

升级为python3.10

yum update

yum install openssl-devel bzip2-devel libffi-devel

yum groupinstall "Development Tools"

wget https://www.python.org/ftp/python/3.10.2/Python-3.10.2.tgz

tar -xzf Python-3.10.2.tgz

cd Python-3.10.2

./configure --enable-optimizations

make altinstall

python3.10 -V

设置软连接：

mv /usr/bin/python3 /usr/bin/python3_old
mv /usr/bin/pip3 /usr/bin/pip3_old

ln -s /usr/local/bin/python3.10 /usr/bin/python3
 ln -s /usr/local/bin/pip3.10  /usr/bin/pip3

运行命令查看python版本

 python3 -V

问题

但是在使用过程中，例如运行python3 a.py，可能会报错

File "/usr/local/lib/python3.10/site-packages/urllib3/connectionpool.py", line 1056, in _new_conn
    raise ImportError(
ImportError: Can't connect to HTTPS URL because the SSL module is not available.

解决办法：

sudo yum install -y epel
sudo yum install -y openssl11-devel
cd Python-3.10.2
sed -i 's/PKG_CONFIG openssl /PKG_CONFIG openssl11 /g' configure
./configure --enable-optimizations
sudo make altinstall
# 如果正确编译了SSL，下面的代码应该可以正常运行
python3.10 -m ssl