Linux安装python3.7（Centos、Ubuntu）

前期安装包

1.sudo apt-get update

关于sudo apt-get update 出现fetch  ppa错误，https://blog.csdn.net/u014775723/article/details/85224026

2.sudo apt-get upgrade

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