Learn Interfaces by Building an Equation Solver - Step 16

Python
1

Tell us what’s happening:

I did print(type(args)) -->tuple -->then args[0] should be the first coefficient, what am I getting wrong?

Your code so far

from abc import ABC, abstractmethod

class Equation(ABC):
    degree: int

# User Editable Region

    def __init__(self, *args):
        
        if args[0] == 0:
            raise ValueError('Highest degree coefficient must be different from zero')
        if (self.degree + 1) != len(args):
            raise TypeError(
                f"'Equation' object takes {self.degree + 1} positional arguments but {len(args)} were given"
            )
        if any(not isinstance(arg, (int, float)) for arg in args):
            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(1, 3)

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Challenge Information:

Learn Interfaces by Building an Equation Solver - Step 16

1 Like
2

Welcome to the forum @emanuele.dm00

Try placing the if statement after the second if statement.

Happy coding

3

Thanks a lot, now it works!
A final question just to be clear…
So logically, it was irrelevant(the code works the same since there are 3 independent ifs) but the website wanted the new code in a specific position?