Learn Interfaces by Building an Equation Solver - Step 14

Python
1

Tell us what’s happening:

sorry I checked all code but I didn’t find solution

Your code so far

from abc import ABC, abstractmethod

# User Editable Region

class Equation(ABC):
    degree: int
    
    def __init__(self, *args):
        if (self.degree + 1) != len(args):
            raise TypeError(
                f"'{self.__class__.__name__}' object takes {self.degree + 1} positional arguments but {len(args)} were given"
            )
            for arg in args:
                if not isinstance(arg, (int, float)) :
                    raise TypeError("Coefficients must be of type 'int' or 'float'")

# User Editable Region

    def __init_subclass__(cls):
        if not hasattr(cls, "degree"):
            raise AttributeError(
                f"Cannot create '{cls.__name__}' class: missing required attribute 'degree'"
            )
    
    @abstractmethod
    def solve(self):
        pass
        
    @abstractmethod
    def analyze(self):
        pass
        
class LinearEquation(Equation):
    degree = 1
    
    def solve(self):
        pass
    
    def analyze(self):
        pass
    
lin_eq = LinearEquation(2, 3)

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Challenge Information:

Learn Interfaces by Building an Equation Solver - Step 14

2

Remember that Python uses indentation to determine which code goes together. Currently for loop will never be executed, as it’s in the same block as raising TypeError.

3

thank you, finally I saw my false