Cygwin：python错误：密码学构建轮失败

如何解决Cygwin：python错误：密码学构建轮失败

我正在使用 cygwin 开发 django 应用程序。我被困在包安装调用 digikey-api。它需要安装加密包，但失败并显示以下错误消息：

generating cffi module 'build/temp.cygwin-3.2.0-x86_64-3.8/_openssl.c'
running build_rust

    =============================DEBUG ASSISTANCE=============================
    If you are seeing a compilation error please try the following steps to
    successfully install cryptography:
    1) Upgrade to the latest pip and try again. This will fix errors for most
       users. See: https://pip.pypa.io/en/stable/installing/#upgrading-pip
    2) Read https://cryptography.io/en/latest/installation.html for specific
       instructions for your platform.
    3) Check our frequently asked questions for more information:
       https://cryptography.io/en/latest/faq.html
    4) Ensure you have a recent Rust toolchain installed:
       https://cryptography.io/en/latest/installation.html#rust
    5) If you are experiencing issues with Rust for *this release only* you may
       set the environment variable `CRYPTOGRAPHY_DONT_BUILD_RUST=1`.
    =============================DEBUG ASSISTANCE=============================

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If you are using an outdated pip version,it is possible a prebuilt wheel is available for this package but pip is not able to install from it.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.

This package requires Rust >=1.41.0.
----------------------------------------
ERROR: Failed building wheel for cryptography
Failed to build cryptography
ERROR: Could not build wheels for cryptography which use PEP 517 and cannot be installed directly
(venv)

我一直在尝试各种解决方案，但到目前为止都没有成功（即 pip install --upgrade pip 没有解决问题）。有趣的是，它在这个 python 虚拟环境中失败了。但是在这个环境之外它是成功的（相同的python版本3.8.10）。

感谢您帮助解决这个问题。塞巴斯蒂安

解决方法

信息很明确

error: can't find Rust compiler

由于 Cygwin 没有 Rust 编译器，因此您无法构建它

https://cygwin.com/packages/package_list.html