The Azure Pipeline example shows using pip to install requirements.
https://docs.microsoft.com/en-us/azure/devops/pipelines/languages/python?view=azure-devops
- script: pip install -r requirements.txt
displayName: 'Install requirements'
The long awaited pip -p is not available, so what is a Pythonista to do when you've been using pipenv and you have Pipfile and Pipfile.lock but no requirements.txt?