Learn Interfaces by Building an Equation Solver - Step 20

Python
1

Tell us what’s happening:

I don´t understand what “falsy” is. Could yo rephrase it?
My stuff doesný pass.

Your code so far

from abc import ABC, abstractmethod

class Equation(ABC):
    degree: int
    
    def __init__(self, *args):
        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'")
        if args[0] == 0:
            raise ValueError("Highest degree coefficient must be different from zero")
        self.coefficients = {(len(args) - n - 1): arg for n, arg in enumerate(args)}

    def __init_subclass__(cls):
        if not hasattr(cls, "degree"):
            raise AttributeError(
                f"Cannot create '{cls.__name__}' class: missing required attribute 'degree'"
            )

# User Editable Region

    def __str__(self):
        terms = []
        for n in coefficients.items(n,coefficient):
            for coefficient in coefficients.items(n,coefficient):
                if coefficients.items(n,coefficient) == 0:
                    pass

# User Editable Region

        equation_string = ' '.join(terms)
        return equation_string        
    
    @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)
print(lin_eq)

Your browser information:

User Agent is: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/141.0.0.0 Safari/537.36

Challenge Information:

Learn Interfaces by Building an Equation Solver - Step 20

2

a falsy value is a value that is similar to false in certain contexts

all values can be divided between truthy and falsy, truthy values are True-like and falsy values are False-like

1 Like
3

Thanks ILM!
How do I write that in the code?

4

you don’t need to write anything specific, when you put the value, it behaves like True or False would

1 Like