使用uv安装python任意版本，命令：uv python install

使用uv安装python任意版本

先使用uv看看可以装哪些版本

uv python list

输出： 

uv python list
cpython-3.14.0a5+freethreaded-linux-x86_64-gnu    <download available>
cpython-3.14.0a5-linux-x86_64-gnu                 <download available>
cpython-3.13.2+freethreaded-linux-x86_64-gnu      <download available>
cpython-3.13.2-linux-x86_64-gnu                   <download available>
cpython-3.12.9-linux-x86_64-gnu                   py312/bin/python3.12
cpython-3.12.9-linux-x86_64-gnu                   py312/bin/python3 -> python3.12
cpython-3.12.9-linux-x86_64-gnu                   py312/bin/python -> python3.12
cpython-3.12.9-linux-x86_64-gnu                   <download available>
cpython-3.11.11-linux-x86_64-gnu                  <download available>
cpython-3.10.16-linux-x86_64-gnu                  <download available>
cpython-3.10.12-linux-x86_64-gnu                  /usr/bin/python3.10
cpython-3.10.12-linux-x86_64-gnu                  /usr/bin/python3 -> python3.10
cpython-3.10.12-linux-x86_64-gnu                  /bin/python3.10
cpython-3.10.12-linux-x86_64-gnu                  /bin/python3 -> python3.10
cpython-3.9.21-linux-x86_64-gnu                   <download available>
cpython-3.8.20-linux-x86_64-gnu                   <download available>
cpython-3.7.9-linux-x86_64-gnu                    <download available>
pypy-3.11.11-linux-x86_64-gnu                     <download available>
pypy-3.10.19-linux-x86_64-gnu                     <download available>
pypy-3.9.19-linux-x86_64-gnu                      <download available>
pypy-3.8.16-linux-x86_64-gnu                      <download available>
pypy-3.7.13-linux-x86_64-gnu                      <download available>

安装python3.9版本

uv python install 3.9

速度有点慢...安装完成，用uv python list来看一下：

cpython-3.9.21-linux-x86_64-gnu                   /home/skywalk/.local/share/uv/python/cpython-3.9.21-linux-x86_64-gnu/bin/python3.9

临时添加到路径

# 临时添加路径（关闭终端后失效）
export PATH="$HOME/.local/share/uv/python/cpython-3.9.21-linux-x86_64-gnu/bin:$PATH"# 验证
python  --version  # 

好的，证明现在就是python3.9了：

python  --version  #
Python 3.9.21

永久添加到 PATH‌

• ‌步骤‌：
  1. 编辑 ~/.bashrc、~/.zshrc 或 ~/.bash_profile：

     bashCopy Code

     echo 'export PATH="$HOME/.local/share/uv/python/3.10.12/bin:$PATH"' >> ~/.bashrc

  2. 执行 source ~/.bashrc 生效

不行，换方法

 创建python3.9虚拟环境

uv venv py39source py39/bin/activate

还是不行

现在只能用这个方法，加参数：--break-system-packages

pip install pip -U --break-system-packages

 测试的时候这样用

安装测试库

pip install -e ".[testing]" --break-system-packages

 测试

pytest

调试

pip install的时候报错This Python installation is managed by uv and should not be modified.

pip install -e ".[testing]"[notice] A new release of pip is available: 24.3.1 -> 25.1.1
[notice] To update, run: pip install --upgrade pip
error: externally-managed-environment× This environment is externally managed
╰─> This Python installation is managed by uv and should not be modified.note: If you believe this is a mistake, please contact your Python installation or OS distribution provider. You can override this, at the risk of breaking your Python installation or OS, by passing --break-system-packages.
hint: See PEP 668 for the detailed specification.

搞不定，只好创建虚拟环境

uv venv py39source py39/bin/activate

 uv venv py39
Using CPython 3.9.21
Creating virtual environment at: py39
Activate with: source py39/bin/activate
(base) skywalk@ubuntu22win:~$ source py39/bin/activate