安装python3.7的步骤
wget https://www.python.org/ftp/python/3.7.3/Python-3.7.3.tar.xz
yum install -y gcc patch libffi-devel python-devel zlib-devel bzip2-devel openssl-devel ncurses-devel sqlite-devel readline-devel tk-devel gdbm-devel db4-devel libpcap-devel xz-devel
tar xvf Python-3.7.3.tar.xz
cd Python-3.7.3/
./configure --prefix=/opt/python3.7 #指定安装目录
在安装过程中遇到两处错误
1"zipimport.ZipImportError: can't decompress data; zlib not available"错误提示，
缺少zlib依赖导致
解决方法：yum install zlib zlib-devel -y
2 ModuleNotFoundError: No module named '_ctypes' 错误提示
缺少libffi依赖导致：
解决方法：yum install libffi-devel -y
3: pip不能使用的问题
pip is configured with locations that require TLS/SSL, however the ssl module in Python is not available. Could not fetch URL https://pypi.org/simple/pip/: There was a problem confirming the ssl certificate: HTTPSConnectionPool(host='pypi.org', port=443):
没有安装openssl软件包导致
解决方法:yum -y install openssl-devel openssl
问题解决后添加环境变量并加载配置
在/etc/profile 中添加
PATH=/opt/python3.7/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/root/bin
加载配置文件
source /etc/profile
4.在安装python虚拟环境软件包时报以下错误
Command "python setup.py egg_info" failed with error code 1 in /tmp/pip-install-2oveqest/virtualenvwrapper/
这个是python版本问题导致
所以
python3 -m pip install --upgrade --force pip #升级一下pip使之兼容python2就解决了
5在安装python3是出现
configure:3885: error: no acceptable C compiler found in $PATH
解决方式：yum -y install gcc