Python3 ssl not available问题彻底解决

Python3.7为例编译安装

首先， No module named '_ctypes' 问题解决：

yum install  libffi libffi-devel

其次：the ssl module in Python is not available 问题

1. 安装libreSSL-2.8.3 下载-解压-configure-make-make install

2. Python 3.7.0要求1.0.2q版本的openssl库 下载、解压 编译 安装

   ./config --prefix=/usr/local/openssl
   ./config -t
   make
   make install

3. echo “/usr/local/openssl/lib” >> /etc/ld.so.conf.d/openssl.conf && ldconfig

4. 打开ssl代码块儿 Python-3.7.0/Modules/Setup.dist

   SSL=/usr/local/openssl
   _ssl _ssl.c
   -DUSE_SSL -I $(SSL)/include -I$(SSL)/include/openssl
   -L$(SSL)/lib -lssl -lcrypto

5. 重新编译Python

   ./configure --prefix=/opt/soft/python3 --enable-optimizations
   make
   make install

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针对这个问题，只能采取最原始的办法来进行安装，具体操作如下;
（1）安装sqlite3的包

$ wget https://www.sqlite.org/2017/sqlite-autoconf-3170000.tar.gz --no-check-certificate
$ tar zxvf sqlite-autoconf-3170000.tar.gz
$ cd sqlite-autoconf-3170000
$ ./configure --prefix=/usr/local/sqlite3 --disable-static --enable-fts5 --enable-json1 CFLAGS="-g -O2 -DSQLITE_ENABLE_FTS3=1 -DSQLITE_ENABLE_FTS4=1 -DSQLITE_ENABLE_RTREE=1"

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（2）对python3进行重新编译
$ cd Python-3.6.2
$ LD_RUN_PATH=/usr/local/sqlite3/lib ./configure LDFLAGS="-L/usr/local/sqlite3/lib" CPPFLAGS="-I /usr/local/sqlite3/include"
$ LD_RUN_PATH=/usr/local/sqlite3/lib make
$ LD_RUN_PATH=/usr/local/sqlite3/lib sudo make install