Python 3.6.9 . ImportError: No module named setuptools_rust and a Command "python setup.py egg

I am trying to install pyOpenSSl and it shows the following error

Requirement already satisfied: six>=1.5.2 in /home/tony/hx-preinstaller-venv/lib/python3.6/site-packages (from pyOpenSSL) Collecting cryptography>=3.3 (from pyOpenSSL) Using cached https://files.pythonhosted.org/packages/cc/98/8a258ab4787e6f835d350639792527d2eb7946ff9fc0caca9c3f4cf5dcfe/cryptography-3.4.8.tar.gz Complete output from command python setup.py egg_info:

        =============================DEBUG ASSISTANCE==========================
        If you are seeing an error here please try the following to
        successfully install cryptography:

        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
        =============================DEBUG ASSISTANCE==========================

Traceback (most recent call last):
  File "<string>", line 1, in <module>
  File "/tmp/pip-build-8toyhikv/cryptography/setup.py", line 14, in <module>
    from setuptools_rust import RustExtension
ModuleNotFoundError: No module named 'setuptools_rust'

the command i ran

pip install pyOpenSSL

Thanks in advance

CodePudding user response：

Try installing setuptools_rust first:

pip install setuptools_rust

And then installing pyOpenSSL again

CodePudding user response：

Have you tried upgrading pip itself first?

pip install --upgrade pip