# 18. Inheritance

#1

I'm stuck at the Inheritance exercise in Introduction to Classes.

I'm getting this error:
Failed to instantiate Equilateral, an error was thrown: 'Equilateral' object has no attribute 'angle1'

I have no idea what I'm doing wrong! Help would be appreciated

``````class Triangle(object):
def __init__(self, angle1, angle2, angle3):
self.angle1 = angle1
self.angle2 = angle2
self.angle3 = angle3
number_of_sides = 3
def check_angles(self):
if self.angle1 + self.angle2 + self.angle3 == 180:
return True
else:
return False

class Equilateral(Triangle):
angle = 60
def __init__(self):
self.angle1 == self.angle
self.angle2 == self.angle
self.angle3 == self.angle

my_triangle = Triangle(90, 30, 60)
print my_triangle.number_of_sides
print my_triangle.check_angles()``````

#2

Hi, @cmiya ,

Does the `__init__` method of your `Equilateral` class contain the three assignment statements that you need there? The assignment operator is a single `=` character.

#3

I got the same result (assignment operator was ok)

#4

Hi, @jocremustech ,

If you post your code, we might be able to identify the problem.

#5

Hi @appylpye ,

Just mentioned the result was the same, I got the solution. Had to read carefully the exercise : -)
Thanks!

#6

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