无法在 Python 3.9 上安装带有诗歌的加密 package

Question

当我尝试在 ZA7F5F35426B927411FC9231B5638217Z 虚拟环境中使用 Python Poetry 1.1.4 package 管理器（获取poetry add cryptography ）安装密码模块时：

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    If you are using an outdated pip version, it is possible a prebuilt wheel is available for this package but pip is not able to install from it.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

虽然我使用的是 pip 21.0.1（最新），但我对 Python 3.8 没有任何问题。

关于为什么以及如何解决这个问题的任何想法？ 最新的加密模块信息表明它与 Python 3.6+ 兼容。

Answer 1

如果您的平台没有可用的wheel ，较新版本的cryptography需要 Rust 从sdist构建wheel 。

参见： https://github.com/pyca/cryptography/issues/5771