Learn Interfaces by Building an Equation Solver - Step 14

Python
1

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Can’t get passed this question for some reason. Need help

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 any(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

What does any() do here?

It seems that a for loop and any() both work on iterables, like a list of arguments.

3

isinstance returns a boolean, any expects an iterable.

4

I thought it checked to see if any of the elements is true

5

I keep getting this error
You should create a for loop that iterates over args after your if statement.

6

are you?
because your code gives this error instead

Your code raised an error before any tests could run. Please fix it and try again.

With the terminal adding TypeError: 'bool' object is not iterable

your code needs to feed an iterable (generator, list, tuple etc, comprehensions included here) to any if you want to use any, not a boolean

but, you are using a for loop. So you get one arg at a time. Why do you need any here?

7

Right and how many elements does arg contain?