CentOS 7.6安装python3.7.0

1、安装依赖包(不安装也可以，但是后续可能会出现某些错误)

[root@py ~]# yum -y install zlib-devel bzip2-devel openssl-devel openssl-static ncurses-devel sqlite-devel readline-devel tk-devel gdbm-devel db4-devel libpcap-devel xz-devel libffi-devel lzma gcc

[root@py ~]# yum -y groupinstall "Development tools"

2、下载python3.7.0安装包

[root@py ~]# cd /usr/local/src

[root@py src]# wget https://www.python.org/ftp/python/3.7.0/Python-3.7.0.tar.xz

3、解压

[root@py src]# tar Jxvf Python-3.7.0.tar.xz

[root@py src]# mv Python-3.7.0 /usr/local/python-3.7

[root@py src]# cd /usr/local/python-3.7/

4、安装

[root@py python-3.7]# ./configure --prefix=/usr/local/sbin/python-3.7

[root@py python-3.7]# make && make install

安装完成后查看python命令指向(默认是指向python2.7)

[root@py ~]# which python
/usr/bin/python
[root@py ~]# ll /usr/bin/ |grep python
-rwxr-xr-x.   1 root root      11312 11月 14 2018 abrt-action-analyze-python
lrwxrwxrwx.   1 root root         35 9月  16 13:03 pip -> /usr/local/sbin/python-3.7/bin/pip3
lrwxrwxrwx.   1 root root         38 9月  16 13:01 python -> /usr/local/sbin/python-3.7/bin/python3    这里我是设置过的
lrwxrwxrwx.   1 root root          9 9月  16 12:10 python2 -> python2.7
-rwxr-xr-x.   1 root root       7216 10月 31 2018 python2.7

5、设置软连接

[root@py ~]# rm -rf /usr/bin/python  #先将原来的指向删除

[root@py ~]# ln -s /usr/local/sbin/python-3.7/bin/python3 /usr/bin/python

6、修改yum，使py2与py3共存

①将/usr/bin/yum的顶部的：

!/usr/bin/python  改成  !/usr/bin/python2.7 

②将/usr/libexec/urlgrabber-ext-down的顶部的：

/usr/bin/python  改为   /usr/bin/python2.7

③将/usr/bin/yum-config-manager的顶部的

#!/usr/bin/python 改为 #!/usr/bin/python2.7

7、最后将pip指向到python3.7

[root@py ~]# ln -sf /usr/local/sbin/python-3.7/bin/pip3 /usr/bin/pip

pip版本为10.0.1，可以更新一下

[root@py ~]# python -m pip install --upgrade pip