> pip install -r requirements.txt
ERROR: Cannot install email-validator==1.1.2, idna==3.1 and requests==2.25.1 because these package versions have conflicting dependencies.
The conflict is caused by:
The user requested idna==3.1
email-validator 1.1.2 depends on idna>=2.0.0
requests 2.25.1 depends on idna<3 and >=2.5
To fix this you could try to:
1. loosen the range of package versions you've specified
2. remove package versions to allow pip attempt to solve the dependency conflict
ERROR: ResolutionImpossible: for help visit https://pip.pypa.io/en/latest/user_guide/#fixing-conflicting-dependencies