当我使用 pycharm 在 django 项目中安装加密时，出现错误。 密码学构建轮失败

Question

While I am installing cryptography got the following error.

Failed building wheel for cryptography
Running setup.py clean for cryptography
Failed to build cryptography
Could not build wheels for cryptography which use PEP 517 and cannot be installed directly

Answer 1

i was have same problem

my config was : python==3.7 django==2.2 pip==19.0.3

and its not from pycharm

its from pip

just upgrade pip to 21.0.1

• Update:

some error code:

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 not find Rust compiler

----------------------------------------
Running setup.py clean for cryptography
Failed to build cryptography

Failed building wheel for cryptography
Could not build wheels for cryptography which use PEP 517 and cannot be installed directly