anchor.diff:  , simpleeval
   , isPy27
   , coveralls
  +, wcmatch
   }:
   
   buildPythonPackage rec {
  
positive.code:     coverage run -m unittest discover -s tests -t tests
    '';
  
    meta = with lib; {
      description = "An authorization library that supports access control models like ACL, RBAC, ABAC in Python";
      homepage = "https://github.com/casbin/pycasbin";
      license = licenses.asl20;
      maintainers = [ maintainers.costrouc ];
    };
  }
  
negative.code: 
    propagatedBuildInputs = [
      simpleeval
      wcmatch
    ];
  
    checkInputs = [
  