CentOS7.9 python3 Can‘t connect to Https URL Because the SSL module is not available（已解决） CentOS7.9 python3 Can‘t connect to Https URL Because the SSL module is not available（已解决）问题概览CentOS7.9编译安装Python3.10运行python脚本的时候报Can‘t connect to Https URL Because the SSL module is not available.当然，这个问题和python3 -c "import ssl" 报错是同一个问题经排查发现是系统openssl版本过低导致的。python3.10依赖的ssl 1.1.1以上的版本。{message type="success" content="注意：其实在编译python3过程中，会输出openssl版本过低的信息，只不过没有突出显示，不仔细查看，难以发现。"/}OK，发现问题之后，已经查明的原因，解决起来就容易多了。我们重新编译安装Openssl，升级系统的openssl版本到1.1.1以上即可解决。这里我们升级至 1.1.1w（openssl官网有更新的3.x ssl版本，但是我们服务器是centos7属于比较旧的版本，对 ssl 3.x兼容性有问题，所以先不用3.x的）编译安装Openssl#安装前先检查Openssl的版本 openssl version #OpenSSL 1.0.2k-fips 26 Jan 2017 yum install perl-core zlib-devel -y cd /usr/local/src wget -S “https://github.com/openssl/openssl/releases/download/OpenSSL_1_1_1w/openssl-1.1.1w.tar.gz” tar -zxvf openssl-1.1.1w.tar.gz cd openssl-1.1.1w ./config --prefix=/usr/local/openssl make && make install mv /usr/bin/openssl  /usr/bin/openssl.bak mv /usr/include/openssl /usr/include/openssl.bak ln -s /usr/local/openssl/bin/openssl /usr/bin/openssl ln -s /usr/local/openssl/include/openssl /usr/local/openssl echo "/usr/local/openssl/lib" > /etc/ld.so.conf.d/openss111w.conf #然后再次检查openssl版本 openssl version #OpenSSL 1.1.1w 11 Sep 2023 (Library: OpenSSL 1.1.1k FIPS 25 Mar 2021) #openssl的目录路径 openssl version -d 》》 OPENSSLDIR: "/usr/local/openssl/ssl"openssl升级完成编译安装python12yum install libffi-devel.x86_64 libdb-devel uuid-devel.x86_64 tk-devel.x86_64 zlib-static.x86_64 zlib-devel -y cd /usr/local/src/ wget https://www.python.org/ftp/python/3.12.6/Python-3.12.6.tgz tar -zxvf Python-3.12.6.tgz cd  Python-3.12.6 openssl version -d #这个命令找到openssl根目录 》》 OPENSSLDIR: "/usr/local/openssl/ssl"  --with-openssl=参数填写这个路径 cd /usr/local/src/ cd  Python-3.12.6 cat >>  Modules/Setup<<EOF SSL="/usr/local/openssl" _ssl _ssl.c \ -DUSE_SSL -I"\$(SSL)"/include -I"\$(SSL)"/include/openssl \ -L"\$(SSL)"/lib -lssl -lcrypto EOF ./configure --prefix=/usr/local/python3.12 --with-openssl=/usr/local/openssl/ssl && make && make install测试/usr/local/python3.12 -r "import ssl" #不报错，则说明模块引入成功Python虚拟环境[root@centos-12 opt]# mkdir -p /var/www [root@centos-12 opt]# cd /var/www/ [root@centos-12 www]# ls [root@centos-12 www]# python3 -m venv myenv [root@centos-12 www]# ls myenv [root@centos-12 www]# source myenv/bin/activate (myenv) [root@centos-12 www]# (myenv) [root@centos-12 www]# python Python 3.12.8 (main, Dec 30 2024, 13:22:30) [GCC 4.8.5 20150623 (Red Hat 4.8.5-44)] on linux Type "help", "copyright", "credits" or "license" for more information. >>> import ssl >>> (myenv) [root@centos-12 www]# deactivate [root@centos-12 www]# [root@centos-12 www]# python Python 2.7.5 (default, Nov 14 2023, 16:14:06) [GCC 4.8.5 20150623 (Red Hat 4.8.5-44)] on linux2 Type "help", "copyright", "credits" or "license" for more information. >>> python虚拟环境总结python3 -m venv myenv ## 使用Python venv模块创建了 名为myenv，当前目录下会生成一个myvenv目录 source myenv/bin/activate ## 激活进入 myenv虚拟环境 deactivate ## 退出虚拟环境 /var/www/myenv/bin/python3 ## 使用绝对路径直接引用Python虚拟环境 /var/www/myenv/bin/pip ## 使用绝对环境直接引用 虚拟环境中的pip