Tell us what’s happening:
what is wrong with these step please any one who solved these problem help me
Your code so far
# User Editable Region
raise AttributeError(
f"Cannot create '{cls.__name__}' class: missing required attribute 'type'"
)
def __str__(self):
terms = []
for n, coefficient in self.coefficients.items():
if not coefficient:
continue
if n == 0:
terms.append(f'{coefficient:+}')
elif n == 1:
terms.append(f'{coefficient:+}x')
else:
terms.append(f"{coefficient:+}x**{n}")
equation_string = ' '.join(terms) + ' = 0'
return re.sub(r"(?<!\d)1(?=x)", "", equation_string.strip("+"))
@abstractmethod
def solve(self):
pass
@abstractmethod
def analyze(self):
pass
class LinearEquation(Equation):
degree = 1
type = 'Linear Equation'
def solve(self):
a, b = self.coefficients.values()
x = -b / a
return [x]
def analyze(self):
slope, intercept = self.coefficients.values()
return {'slope': slope, 'intercept': intercept}
class QuadraticEquation(Equation):
degree = 2
type = 'Quadratic Equation'
def __init__(self, *args):
super().__init__(*args)
a, b, c = self.coefficients.values()
self.delta = b**2 - 4 * a * c
def solve(self):
if self.delta < 0:
return []
a, b, _ = self.coefficients.values()
x1 = (-b + (self.delta) ** 0.5) / (2 * a)
x2 = (-b - (self.delta) ** 0.5) / (2 * a)
if self.delta == 0:
return [x1]
return [x1, x2]
def analyze(self):
a, b, c = self.coefficients.values()
x = -b / (2 * a)
y = a * x**2 + b * x + c
if a > 0:
concavity = 'upwards'
min_max = 'min'
else:
concavity = 'downwards'
min_max = 'max'
return {'x': x, 'y': y, 'min_max': min_max, 'concavity': concavity}
def solver(equation):
if not isinstance(equation, Equation):
raise TypeError("Argument must be an Equation object")
output_string = f'{equation.type:-^24}\n'
output_string += f'\n{equation!s:^24}\n\n'
output_string += f'{"Solutions":-^24}\n\n'
results = equation.solve()
match results:
case []:
result_list = ['No real roots']
case [x]:
result_list = [f'x = {x:+.3f}']
case [x1, x2]:
result_list = [f'x1 = {x1:+.3f}', f'x2 = {x2:+.3f}']
for result in result_list:
output_string += f'{result:^24}\n'
output_string += f'\n{"Details":-^24}\n\n'
details = equation.analyze()
match details:
case {'slope': slope, 'intercept': intercept}:
details_list = [
f'slope = {slope:.3f}',
f'y-intercept = {intercept:.3f}'
]
case {'x': x, 'y': y, 'min_max': min_max, 'concavity': concavity}:
coord = f'({x:.3f}, {y:.3f})'
details_list = [
f' concavity = {concavity}',
f' {min_max} = {coord}'
]
for detail in details_list:
output_string += f'{detail}\n'
return output_string
lin_eq = LinearEquation(2, 3)
quadr_eq = QuadraticEquation(1, 2, 1)
print(solver(quadr_eq))
# User Editable Region
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Challenge Information:
Learn Interfaces by Building an Equation Solver - Step 67