python3 -m venv venvto create a virtual env namedvenv.source venv/bin/activateactivate the local virtualenv.deactivateto exit the local virtual env.
pip3 install -r requirements.txtto install dependenciespip3 freeze > requirements.txtto save newly installed dependencies
pip3 install -e .to install the crypto package itself for testspytestto run all testspytest -k name_of_test_fileto run all tests in a filepytest -k name_of_testto run a single test