Python Classes ('' object has no attribute '')

Question

I defined a class, but when I want to use the function in the class, it gives me an error as follows. Can anybody help me? thank you so much.

points = 5
class State:
 def __init__(self, a, b, E_min, E_max, P_s_a, P_s_b, points)):
 self.state = state
 self.isEnd = False
 self.a = a
 self.b = b
 self.E_min = E_min
 self.E_max = E_max
 self.P_s_a = P_s_a
 self.P_s_b = P_s_b
 self.points = points
 y_model = np.zeros(self.points)
 def model(self):
 for j in range(0, points):
 y_model[j] = a * j + b
print(State.model(2,3))
AttributeError: class State has no attribute 'model'

• Barmar: Your indentation is wrong, the model() definition is internal to __init__().
• AMC: Please provide the entire error message, as well as a minimal reproducible example.

Answer 1

When you define model, it is defined inside __init__. To fix this you must change the indentation.

points = 5
class State:
 def __init__(self, a, b, E_min, E_max, P_s_a, P_s_b, points)):
 self.state = state
 self.isEnd = False
 self.a = a
 self.b = b
 self.E_min = E_min
 self.E_max = E_max
 self.P_s_a = P_s_a
 self.P_s_b = P_s_b
 self.points = points
 y_model = np.zeros(self.points)
 def model(self):
 for j in range(0, points):
 y_model[j] = a * j + b
print(State.model(2,3))