当你输入wget https://www.python.org/ftp/python/3.5.2/Python-3.5.2.tgz时，
当wget出现
Unable to establish SSL connection
这时你需要安装：
# sudo apt-get install libssl-dev
当wget出现
Can’t connect to HTTPS URL because the SSL module is not available
你需要安装：
# sudo apt-get install openssl