Python3源码升级

Python3.5升级到3.9.2

0、准备工作

删除Python3的软链接，它是指向Python3.5的
sudo rm /usr/bin/python3

其他问题，网上有说要先安装libffi-dev

sudo apt install libffi-dev

删除lsb_release,可能会出现以下错误
subprocess.CalledProcessError: Command '('lsb_release', '-a')' returned non-zero exit status 1

sudo cp /usr/bin/lsb_release /home/lsb_release  #先备份一下

sudo rm -rf /usr/bin/lsb_release

1、下载Python源码
https://www.python.org/ftp/python/3.9.2/Python-3.9.2.tar.xz

命令方式为：

cd /home
curl https://www.python.org/ftp/python/3.9.2/Python-3.9.2.tar.xz  -o Python-3.9.2.tar.xz 

2、解压

cd /home

xz -d Python-3.9.2.tar.xz 

tar -xvf Python-3.9.2.tar

3、编译

cd Python-3.9.2
sudo ./configure  --prefix=/usr/local/python3.9

sudo make

sudo make install 

4、配置
将原来的python3指向Python3.9.2

sudo ln -s /usr/local/python3.9/bin/python3.9 /usr/bin/python3
环境变量配置

echo 'export PATH=/usr/local/python3.8/bin:$PATH' >>~/.bashrc
source ~/.bashrc

5、验证

python3 -V

Python 3.9.2

6、使用国内镜像源

mkdir ~/.pip
cd ~/.pip
sudo vi ~/.pip/pip.conf

将以下内容贴入pip.conf中去

[global] 
index-url = https://pypi.tuna.tsinghua.edu.cn/simple
[install]
trusted-host = https://pypi.tuna.tsinghua.edu.cn  # trusted-host 此参数是为了避免麻烦，否则使用的时候可能会提示不受信任

7、安装升级第三方库

sudo apt install python3-pip

python3 -m pip install --upgrade pip

WARNING: The scripts pip, pip3 and pip3.9 are installed in '/usr/local/python3.9/bin' which is not on PATH.
  Consider adding this directory to PATH or, if you prefer to suppress this warning, use --no-warn-script-location.

 echo 'export PATH=/usr/local/python3.9/bin:$PATH' >>~/.bashrc
 source ~/.bashrc

python3 -m pip install pandas

python3 -m pip install numpy

python3 -m pip install tensorflow