Centos7.3 下安装python3与卸载

安装python3

1.安装依赖

yum install zlib-devel bzip2-devel openssl-devel ncurses-devel sqlite-devel readline-devel tk-devel gcc* make -y

2.下载对应版本python安装包

我这里是3.7.5

wget https://www.python.org/ftp/python/3.7.5/Python-3.7.5.tar.xz

3.解压缩python安装包

tar -Jxvf Python-3.7.5.tar.xz 

4.配置安装路径

注意大小写！

cd Python-3.7.5

./configure prefix=/usr/local/python3

5.编译安装

cd Python-3.7.5

make && make install

6.配置符号连接

如果提示文件已存在，不必重复执行

cd /bin

ln -s /usr/local/python3/bin/python3 /usr/bin/python3

ln -s /usr/local/python3/bin/pip3 /usr/bin/pip3

7.至此成功安装了Python

python -V

pyenv: python: command not found

The `python' command exists in these Python versions:
  3.7.5

​```python
python3

```python
print('Hello World~')

Hello World~

8.如果步骤7提示:

未找到命令`python`,可尝试设置默认python版本

pyenv local 3.7.5

python -V

Python 3.7.5

9.卸载python命令

rpm -qa|grep python2|xargs rpm -ev --allmatches --nodeps

whereis python2 |xargs rm -frv

10.查看现有python

whereis python

完

感谢作者 Python及时行乐 思路。