yum -y install gcc gcc-c++ make openssl-devel bzip2-devel zlib-devel xz-devel

wget https://ftp.openbsd.org/pub/OpenBSD/LibreSSL/libressl-2.6.4.tar.gz
tar zxf libressl-2.6.4.tar.gz -C /usr/local/src

cd /usr/local/src/libressl-2.6.4
./configure --prefix=/usr/local/ssl
make && make install

cat > /etc/ld.so.conf.d/libressl.conf <<EOF
/usr/local/ssl/lib
EOF
ldconfig

cat >> ~/.bash_profile <<EOF
LD_LIBRARY_PATH=\$LD_LIBRARY_PATH:/usr/local/ssl/lib
export LD_LIBRARY_PATH
EOF
source ~/.bash_profile

wget https://www.python.org/ftp/python/3.6.5/Python-3.6.5.tgz
tar zxf Python-3.6.5.tgz -C /usr/local/src

cd /usr/local/src/Python-3.6.5
./configure \
    --prefix=/usr/local/python3 \
    --enable-optimizations \
    --enable-shared \
    --enable-ipv6
make && make install

cat > /etc/ld.so.conf.d/python3.conf <<EOF
/usr/local/python3/lib
EOF
ldconfig

mkdir ~/.pip
cat > ~/.pip/pip.conf <<EOF
[global]
index-url = https://mirrors.aliyun.com/pypi/simple/

[install]
trusted-host=mirrors.aliyun.com
EOF

/usr/local/python3/bin/python3 -m pip install --upgrade pip