--description--

In Python, data types are recognized during runtime (when the code is executed). Therefore, you don't have to specify the data type of a variable when you declare it. Nonetheless, you can annotate a variable to clarify that it will hold a specific data type with variable: <data type> = value or just variable: <data type>. Note that the Python interpreter does not enforce the types used to annotate variables, and normally you'd need external tools to do it.

Inside the Equation class, define a class attribute degree. Do not assign it a value. Instead use a type annotation of int to show that it will store an integer number inside the concrete classes.

Later on, you'll use this class attribute as a part of the validation process of the arguments passed to instantiate the equation objects.

--hints--

You should define class attribute named degree and annotate it with int within the Equation class.

({ test: () => assert(runPython(`_Node(_code).find_class("Equation").find_variable("degree").is_equivalent("degree: int")`)) })

--seed--

--seed-contents--

from abc import ABC, abstractmethod
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class Equation(ABC):
    def __init__(self):
        pass
    
    @abstractmethod
    def solve(self):
        pass
        
    @abstractmethod
    def analyze(self):
        pass


class LinearEquation(Equation):
    def solve(self):
        pass

    def analyze(self):
        pass
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lin_eq = LinearEquation()