python 不能增量升级，只能卸载老的，再安装新的版本。
yum install libffi-devel zlib-devel openssl-devel readline-devel # 安装pandas需要 yum install bzip2-devel xz-devel python-backports-lzma wget https://www.python.org/ftp/python/3.9.4/Python-3.9.4.tgz cd Python-3.9.4 tar -xvf Python-3.9.4.tgz ./configure --prefix=/usr/local/python3 make && make install make clean ln -s /usr/local/python3/bin/python3 /usr/bin/python3 ln -s /usr/local/python3/bin/pip3 /usr/bin/pip3
安装成功
rm /usr/local/python3/lib/python3.9/lib-dynload/_sysconfigdata__linux_x86_64-linux-gnu.py rm -r /usr/local/python3/lib/python3.9/lib-dynload/__pycache__ /usr/bin/install -c -m 644 ./Misc/python.man \ /usr/local/python3/share/man/man1/python3.9.1 if test ! -d /usr/local/python3/lib/pkgconfig; then \ echo "Creating directory /usr/local/python3/lib/pkgconfig"; \ /usr/bin/install -c -d -m 755 /usr/local/python3/lib/pkgconfig; \ fi if test -f /usr/local/python3/bin/python3 -o -h /usr/local/python3/bin/python3; \ then rm -f /usr/local/python3/bin/python3; \ else true; \ fi (cd /usr/local/python3/bin; ln -s python3.9 python3) if test "3.9" != "3.9"; then \ rm -f /usr/local/python3/bin/python3.9-config; \ (cd /usr/local/python3/bin; ln -s python3.9-config python3.9-config); \ rm -f /usr/local/python3/lib/pkgconfig/python-3.9.pc; \ (cd /usr/local/python3/lib/pkgconfig; ln -s python-3.9.pc python-3.9.pc); \ rm -f /usr/local/python3/lib/pkgconfig/python-3.9-embed.pc; \ (cd /usr/local/python3/lib/pkgconfig; ln -s python-3.9-embed.pc python-3.9-embed.pc); \ fi rm -f /usr/local/python3/bin/python3-config (cd /usr/local/python3/bin; ln -s python3.9-config python3-config) rm -f /usr/local/python3/lib/pkgconfig/python3.pc (cd /usr/local/python3/lib/pkgconfig; ln -s python-3.9.pc python3.pc) rm -f /usr/local/python3/lib/pkgconfig/python3-embed.pc (cd /usr/local/python3/lib/pkgconfig; ln -s python-3.9-embed.pc python3-embed.pc) rm -f /usr/local/python3/bin/idle3 (cd /usr/local/python3/bin; ln -s idle3.9 idle3) rm -f /usr/local/python3/bin/pydoc3 (cd /usr/local/python3/bin; ln -s pydoc3.9 pydoc3) rm -f /usr/local/python3/bin/2to3 (cd /usr/local/python3/bin; ln -s 2to3-3.9 2to3) if test "x" != "x" ; then \ rm -f /usr/local/python3/bin/python3-32; \ (cd /usr/local/python3/bin; ln -s python3.9-32 python3-32) \ fi rm -f /usr/local/python3/share/man/man1/python3.1 (cd /usr/local/python3/share/man/man1; ln -s python3.9.1 python3.1) if test "xupgrade" != "xno" ; then \ case upgrade in \ upgrade) ensurepip="--upgrade" ;; \ install|*) ensurepip="" ;; \ esac; \ ./python -E -m ensurepip \ $ensurepip --root=/ ; \ fi Looking in links: /tmp/tmpu4v_dlxm Processing /tmp/tmpu4v_dlxm/setuptools-49.2.1-py3-none-any.whl Processing /tmp/tmpu4v_dlxm/pip-20.2.3-py2.py3-none-any.whl Installing collected packages: setuptools, pip WARNING: The script easy_install-3.9 is installed in '/usr/local/python3/bin' which is not on PATH. Consider adding this directory to PATH or, if you prefer to suppress this warning, use --no-warn-script-location. WARNING: The scripts pip3 and pip3.9 are installed in '/usr/local/python3/bin' which is not on PATH. Consider adding this directory to PATH or, if you prefer to suppress this warning, use --no-warn-script-location. Successfully installed pip-20.2.3 setuptools-49.2.1