error: can‘t find Rust compiler

操作系统 win11

pip install -r requirements.txt

报错如下

Using cached https://pypi.tuna.tsinghua.edu.cn/packages/56/fc/a3c13ded7b3057680c8ae95a9b6cc83e63657c38e0005c400a5d018a33a7/pyreadline3-3.4.1-py3-none-any.whl (95 kB)
Building wheels for collected packages: safetensors
  Building wheel for safetensors (pyproject.toml) ... error
  error: subprocess-exited-with-error

  × Building wheel for safetensors (pyproject.toml) did not run successfully.
  │ exit code: 1
  ╰─> [25 lines of output]
      running bdist_wheel
      running build
      running build_py
      creating build
      creating buildlib.win-amd64-cpython-38
      creating buildlib.win-amd64-cpython-38safetensors
      copying py_srcsafetensorsflax.py -> buildlib.win-amd64-cpython-38safetensors
      copying py_srcsafetensorsnumpy.py -> buildlib.win-amd64-cpython-38safetensors
      copying py_srcsafetensorspaddle.py -> buildlib.win-amd64-cpython-38safetensors
      copying py_srcsafetensorstensorflow.py -> buildlib.win-amd64-cpython-38safetensors
      copying py_srcsafetensorstorch.py -> buildlib.win-amd64-cpython-38safetensors
      copying py_srcsafetensors__init__.py -> buildlib.win-amd64-cpython-38safetensors
      running build_ext
      running build_rust
      error: can't find Rust compiler

      If you are using an outdated pip version, it is possible a prebuilt wheel is available for this package but pip is not able to install from it. Installing from the wheel would avoid the need for a Rust compiler.

      To update pip, run:

          pip install --upgrade pip

      and then retry package installation.

      If you did intend to build this package from source, try installing a Rust compiler from your system package manager and ensure it is on the PATH during installation. Alternatively, rustup (available at https://rustup.rs) is the recommended way to download and update the Rust compiler toolchain.
      [end of output]

  note: This error originates from a subprocess, and is likely not a problem with pip.
  ERROR: Failed building wheel for safetensors
Failed to build safetensors
ERROR: Could not build wheels for safetensors, which is required to install pyproject.toml-based projects

解决方法：

去官网下载安装rustup.rs - The Rust toolchain installer

下载完rustup-init.exe，运行安装，会出现窗口提示需要预先安装vs，按默认安装即可。等一会vs安装成功。

需要再次手动运行rustup-init.exe，这次就是正式安装了， 都按模型走即可。全部结束就安装成功了。

再去执行pip安装即可。