Centos、Ubuntu Linux安装python3.7

前期安装包 1.sudo apt-get update
关于sudo apt-get update 出现fetchppa错误，https://blog.csdn.net/u014775723/article/details/85224026
2.sudo apt-get upgrade
【Centos、Ubuntu Linux安装python3.7】关于sudo apt-get upgrade相关错误：https://blog.csdn.net/u014775723/article/details/85224071
3.sudo apt-get dist-upgrade
4.sudo apt-get install build-essential python-dev python-setuptools python-pip python-smbus
5.sudo apt-get install build-essential libncursesw5-dev libgdbm-dev libc6-dev
6.sudo apt-get install zlib1g-dev libsqlite3-dev tk-dev
7.sudo apt-get install libssl-dev openssl
8.sudo apt-get install libffi-dev
安装3.7 1. yum -y install zlib*
2. yum install openssl-devel libffi-devel bzip2-devel -y
3. wget https://www.python.org/ftp/python/3.7.4/Python-3.7.4.tgz
4. tar -zxvf Python-3.7.4.tgz
5. cd Python-3.7.4
6. ./configure --with-ssl
7. make
8. make test
8. sudo make install
9. 测试，输入python3.7
设置默认，可切换 1. rm /usr/bin/python
2. ln -s /usr/bin/python3.4 /usr/bin/python
3. mv /usr/bin/python /usr/bin/python.bak
4. ln -s /usr/local/bin/python3 /usr/bin/python
5. mv /usr/bin/pip /usr/bin/pip.bak
6. ln -s /usr/local/bin/pip3 /usr/bin/pip
输入python -V验证
设置切换
sudo update-alternatives --install /usr/bin/python python /usr/bin/python2 100
sudo update-alternatives --install /usr/bin/python python /usr/local/bin/python3 200
切换命令：sudo update-alternatives --config python