Python: https://www.python.org/downloads/
安装
# wget https://www.python.org/ftp/python/3.7.3/Python-3.7.3.tgz
# yum install gcc make libffi-devel zlib-devel bzip2-devel openssl-devel ncurses-devel sqlite-devel readline-devel tk-devel
# tar -zxf Python-3.7.3.tgz
# cd Python-3.7.3/
# ./configure --prefix=/usr/local/python37
# make
# make install配置环境变量（python和pip）
# mv /usr/bin/python /usr/bin/python.bak
# ln -s /usr/local/python37/bin/python3 /usr/bin/python
# mv /usr/bin/pip /usr/bin/pip.bak
# ln -s /usr/local/python37/bin/pip3 /usr/bin/pip验证
# python -V
Python 3.7.3
# pip -V
pip 19.0.3 from /usr/local/python37/lib/python3.7/site-packages/pip (python 3.7)yum错误解决
更改系统默认的python命令后，再次使用yum命令报错：
# yum install openssl-devel
File "/bin/yum", line 30
except KeyboardInterrupt, e:
^
SyntaxError: invalid syntax这是因为yum采用python作为命令解释器，原来系统自带的python解释器为python2.7，而我们将python默认的解释器设为python3.7，导致按python3.7解析2.7的语法出错。
解决方法：
修改/usr/bin/yum及/usr/libexec/urlgrabber-ext-down文件中的第一行为#!/usr/bin/python2.7
# vim /bin/yum修改内容：
#!/usr/bin/python2.7# vim /usr/libexec/urlgrabber-ext-down修改内容：
#! /usr/bin/python2.7
