1. 遇到的问题，我在用pip安装三方工具的时候出现错误
pip is configured with locations that require TLS/SSL
1 ./configure --prefix=/usr/local/python3 --with-ssl 2 3 make 4 5 make install
需要重新编译python
创建软连接
ln -s /usr/local/python3/bin/python3 /usr/bin/python 这样在根目录输入python直接可以进入python环境
ln -s /usr/local/python3/bin/pip3 /usr/local/pip 同上
2. centos8 安装python3.9
1. 准备编译环境
yum groupinstall 'development tools'
yum install bzip2-devel expat-devel gdbm-devel ncurses-devel openssl-devel readline-devel sqlite-devel tk-devel xz-devel zlib-devel wget
yum install libffi-devel -y
2. 下载python3.9
wget https://www.python.org/ftp/python/3.9.0/Python-3.9.0.tgz
3. 解压下载后的文件
tar zxvf Python-3.9.0.tgz
4. 编译安装
./configure --prefix=/usr/local/python3.9 make && make altinstall
5. 建立软连接
ln -s /usr/local/bin/python3.9 /usr/local/bin/python3 ln -s /usr/local/bin/pip3.9 /usr/local/bin/pip3
Centos8 下升级python3.6到3.9
1. 官网下载python3.9源码文件
wget source_code_url
2. 解压文件
tar -zxvf Python3.9.x.tgz
3. 安装必要的包(根据提示，有就不用安装了)
dnf -y install gcc zlib* libffi-devel
4. 进入解压目录，进行编译和安装(根据需要自定义目录)
cd python3.9_folder ./configure --prefix=/usr/local/bin/python3 make&&make install
5. 删除原先的命令，并建立新的软连接
rm -rf /usr/bin/python3
ln -s /usr/local/bin/python3/bin/python3 /usr/bin/python3
6. 检查并验证
python3 -V