python環境：python 3.8
報錯信息：
WARNING: pip is configured with locations that require TLS/SSL, however the ssl module in Python is not available.
Collecting pip3
WARNING: Retrying (Retry(total=4, connect=None, read=None, redirect=None, status=None)) after connection broken by 'SSLError("Can't connect to HTTPS URL because the SSL module is not available.")': /simple/pip3/
WARNING: Retrying (Retry(total=3, connect=None, read=None, redirect=None, status=None)) after connection broken by 'SSLError("Can't connect to HTTPS URL because the SSL module is not available.")': /simple/pip3/
WARNING: Retrying (Retry(total=2, connect=None, read=None, redirect=None, status=None)) after connection broken by 'SSLError("Can't connect to HTTPS URL because the SSL module is not available.")': /simple/pip3/
WARNING: Retrying (Retry(total=1, connect=None, read=None, redirect=None, status=None)) after connection broken by 'SSLError("Can't connect to HTTPS URL because the SSL module is not available.")': /simple/pip3/
WARNING: Retrying (Retry(total=0, connect=None, read=None, redirect=None, status=None)) after connection broken by 'SSLError("Can't connect to HTTPS URL because the SSL module is not available.")': /simple/pip3/
Could not fetch URL https://pypi.org/simple/pip3/: There was a problem confirming the ssl certificate: HTTPSConnectionPool(host='pypi.org', port=443): Max retries exceeded with url: /simple/pip3/ (Caused by SSLError("Can't connect to HTTPS URL because the SSL module is not available.")) - skipping
ERROR: Could not find a version that satisfies the requirement pip3 (from versions: none)
ERROR: No matching distribution found for pip3
WARNING: 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): Max retries exceeded with url: /simple/pip/ (Caused by SSLError("Can't connect to HTTPS URL because the SSL module is not available.")) - skipping
安裝python 3.8的方法：centos安裝httprunner方法
執行命令：
#pip install httprunner
報錯：使用pip 命令失敗，見頂部“報錯信息”
解決辦法：升級openssl
1、查看openssl版本
# openssl version
OpenSSL 1.0.1e-fips 11 Feb 2013
# cat /etc/issue
CentOS release 6.6 (Final)
Kernel \r on an \m
原因：系統版本centos6.6，其中openssl的版本為OpenSSL 1.0.1e-fips 11 Feb 2013,而python3.8需要的openssl的版本為1.0.2或者1.1.x,需要對openssl進行升級，並重新編譯python3.8.0。
注意：yum 安裝的openssl 版本都比較低。
2、下載openssl
#wget https://www.openssl.org/source/openssl-1.1.1a.tar.gz
#tar -zxvf openssl-1.1.1a.tar.gz
#cd openssl-1.1.1a
3、編譯安裝
#./config --prefix=/usr/local/openssl no-zlib #不需要zlib
#make && make install
4、備份原配置
#mv /usr/bin/openssl /usr/bin/openssl.bak
#mv /usr/include/openssl/ /usr/include/openssl.bak
5、新版配置
#ln -s /usr/local/openssl/include/openssl /usr/include/openssl
#ln -s /usr/local/openssl/lib/libssl.so.1.1 /usr/local/lib64/libssl.so
#ln -s /usr/local/openssl/bin/openssl /usr/bin/openssl
6、修改系統配置
1）寫入openssl庫文件的搜索路徑
#echo "/usr/local/openssl/lib" >> /etc/ld.so.conf
2）使修改后的/etc/ld.so.conf生效
#ldconfig -v
7、查看openssl版本
# openssl version
OpenSSL 1.1.1a 20 Nov 2018
8、重新安裝python
進入python解壓縮文件夾，執行
#./configure --prefix=/usr/local/python3 --with-openssl=/usr/local/openssl
#make
#make install
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