CentOS7.4安装Python3.7.4

在CentOS7.4使用Python3执行脚本，发现自带的是python2，进行下安装python3，是Python 是调用python2，python3调用python3.7.4版本，安装如下：
创建Python源码存放目录

mkdir /data/python3
cd /data/python3

下载Python3.7.4版本的tgz包，或windows下载上传到此目录下

wget https://www.python.org/ftp/python/3.7.4/Python-3.7.4.tgz

解压：tar zxvf Python-3.7.4.tgz
安装Python3依赖的库

yum -y install zlib-devel bzip2-devel openssl-devel ncurses-devel sqlite-devel readline-devel tk-devel gdbm-devel db4-devel libpcap-devel xz-devel gcc libffi-devel gcc make automake autoconf libtool libffi-devel

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创建编译后程序运行目录

mkdir /usr/local/python3
./configure --prefix=/usr/local/python3
make && make install 
ln -s /usr/local/python3/bin/python3 /usr/bin/python3
ln -s /usr/local/python3/bin/pip3 /usr/bin/pip3

验证

python3 -V
pip3 -V

升级pip3

pip3 install --upgrade pip

安装验证

pip3 install -U selenium