https://blog.csdn.net/Test_Sir_Cao/article/details/107356218
https://www.cnblogs.com/reaptem/p/13887231.html
centos 8 安裝 python3.9
1、准備編譯環境
dnf groupinstall 'development tools'
dnf install bzip2-devel expat-devel gdbm-devel ncurses-devel openssl-devel readline-devel sqlite-devel tk-devel xz-devel zlib-devel wget
dnf install libffi-devel -y
2、下載
mkdir download
cd download
wget https://www.python.org/ftp/python/3.9.0/Python-3.9.0a6.tgz
3、編譯&安裝
tar -zxvf Python-3.9.0a6.tgz
cd Python-3.9.0a6
./configure --enable-optimizations
make && make altinstall
4、建立軟連接
ln -s /usr/local/bin/python3.9 /usr/local/bin/python3
ln -s /usr/local/bin/pip3.9 /usr/local/bin/pip3
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CentOS8下升級Python3.6到3.9
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1，官網下載Python3.9源碼文件
wget source_code_url
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2，解壓文件
tar -zxvf Python3.9.x.tgz
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3，安裝必要的包 (
根據提示，有就不用安裝了)dnf -y install gcc zlib* libffi-devel
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4，進入解壓目錄，進行編譯和安裝(根據需要自定義目錄)
cd python3.9_folder./configure --prefix=/usr/local/bin/python3make&&make install
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5，刪除原先的命令，並建立新的軟連接
rm -rf /usr/bin/python3ln -s /usr/local/bin/python3/bin/python3 /usr/bin/python3
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6，檢查並驗證
python3 -V