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'

Your indentation is wrong, the model() definition is internal to __init__(). — Barmar
– Barmar, Commented Mar 6, 2020 at 1:51
Please provide the entire error message, as well as a minimal reproducible example. — AMC
– AMC, Commented Mar 6, 2020 at 2:59

sportzpikachu · Accepted Answer · 2020-03-06 01:53:08Z

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))

answered Mar 6, 2020 at 1:53

sportzpikachu

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