由于没有GCC无法编译安装Python3.6， 所以先安装GCC（yum install gcc）
下载地址:https://www.python.org/ftp/python/
1 tar zxvf Python-3.5.2.tgz
2 cd Python-3.5.2
3 ./configure --prefix=/usr/local/python35
4 make && make install
然后安装pip3，然后用pip3安装包的时候遇到：
pip is configured with locations that require TLS/SSL, however the ssl module in Python is not available.
解决办法：
# rpm -aq|grep openssl
1). yum install openssl-devel -y
yum install openssl
yum libssl-dev
2).
#修改Setup文件
vi /usr/software/Python-2.7.5/Modules/Setup
#修改结果如下：
# 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
3). 重新编译安装Python3
./configure --enable-optimizations
make altinstall
4). 可以正常用pip3安装包了。
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I ran into the same error when building Python 3.6.1 from source under CentOS 7. For CentOS7, I had to first: Then: Now
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refer: https://stackoverflow.com/questions/41489439/pip3-installs-inside-virtual-environment-with-python3-6-failing-due-to-ssl-modul
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