[www@pythontab.com ~]$ python
Python 2.7.15 (default, Oct 23 2018, 18:08:43) 
[GCC 4.4.7 20120313 (Red Hat 4.4.7-23)] on linux2
Type "help", "copyright", "credits" or "license" for more information.
> import ssl
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "/usr/local/python27/lib/python2.7/ssl.py", line 60, in <module>
import _ssl # if we can't import it, let the error propagate
ImportError: No module named _ssl
>

[www@pythontab.com ~]$ rpm -aq|grep openssl
openssl-0.9.8e-20.el5
openssl-0.9.8e-20.el5
[www@pythontab.com ~]$

[www@pythontab.com ~]$ yum install openssl-devel -y
#查看安装结果
[www@pythontab.com ~]$ rpm -aq|grep openssl
openssl-devel-1.0.1e-57.el6.x86_64
openssl-1.0.1e-57.el6.x86_64

vi /src/Python-2.7.15/Modules/Setup

# Socket module helper for socket(2)
_socket socketmodule.c timemodule.c
# Socket module helper for SSL support; you must comment out the other
# socket line above, and possibly edit the SSL variable:
#SSL=/usr/local/ssl
_ssl _ssl.c -DUSE_SSL -I$(SSL)/include -I$(SSL)/include/openssl -L$(SSL)/lib -lssl -lcrypto

[www@pythontab.com ~]$ cd /src/Python-2.7.15/
[www@pythontab.com ~]$ make
[www@pythontab.com ~]$ make install

[www@pythontab.com ~]$ python
Python 2.7.15 (default, Oct 23 2018, 19:08:43)
[GCC 4.4.7 20120313 (Red Hat 4.4.7-23)] on linux2
Type "help", "copyright", "credits" or "license" for more information.
> import ssl
>

ll /usr/bin | grep python
mv /usr/bin/python /usr/bin/python2.7

rm -rf /usr/bin/python
ln -s /usr/local/bin/python3.6 /usr/bin/python
python -V

# vi /usr/bin/yum
#!/usr/bin/python2.7
修改urlgrabber-ext-down文件，更改python版本

# vi /usr/libexec/urlgrabber-ext-down
#!/usr/bin/python2.7
Could not fetch URL https://pypi.python.org/simple/six/: There was a problem confirming the ssl certificate: Can't connect to HTTPS URL because the SSL module is not available. - skipping

curl https://bootstrap.pypa.io/get-pip.py -o get-pip.py

/usr/local/python/bin/python3 get-pip.py

vim ~/.bash_profile

export PATH=/usr/local/python/bin:$PATH

source ~/.bash_profile

[root@huo ~]# python3
Python 3.6.5 (default, Apr 1 2018, 20:41:34)
[GCC 4.8.5 20150623 (Red Hat 4.8.5-16)] on linux
Type "help", "copyright", "credits" or "license" for more information.
>

#!/bin/bash
echo "正在安装相关组件"
yum install -y openssl-devel bzip2-devel expat-devel gdbm-devel readline-devel sqlite-devel gcc-c++ gcc openssl-devel
 
echo "下载安装包"
wget https://www.python.org/ftp/python/3.6.5/Python-3.6.5.tgz
 
echo "正在解压安装包"
tar -xf Python-3.6.5.tgz -C /root/ && cd /root/Python-3.6.5/
 
echo "添加ssl支持"
cat  /root/Python-3.6.5/Modules/Setup.dist <<"EOF"
_socket socketmodule.c
 
SSL=/usr/local/ssl
_ssl _ssl.c -DUSE_SSL -I$(SSL)/include -I$(SSL)/include/openssl -L$(SSL)/lib -lssl -lcrypto
EOF
 
echo "正在编译安装Python"
./configure --prefix=/usr/local/python && make && make install
cd /root
 
echo "删除安装包"
rm -rf /root/Python-3.6.5.tgz && rm -rf /root/Python-3.6.5
 
echo "正在添加环境变量"
echo "export PATH=/usr/local/python/bin:$PATH" ~/.bash_profile
source ~/.bash_profile
 
echo "安装完成,请执行python3进行测试"