--description--

Unlike other programming languages, Python does not implement interfaces in its core language, but the Python standard library allows you to define interfaces in a simple way.

For this project, you'll use utilities from the abc module. Therefore, import this module in your code.

--hints--

You should import the abc module.

({ test: () => assert(runPython(`_Node(_code).has_import("import abc")`)) })

--seed--

--seed-contents--

--fcc-editable-region--

--fcc-editable-region--
class Equation:
    def solve(self):
        pass
        
    def analyze(self):
        pass
        

class LinearEquation(Equation):
    pass
    

eq = Equation()
lin_eq = LinearEquation()