NameError: name 'self' is not defined: Python

Question

I have two programs in python. The Program contains a class and function init and second program is for calling the program1.

I am getting below error which is mentioned in the screenshot. enter image description here

Here are the two programs: f1.py

---

class Getdata:
def __init__(self):
    self.IMAGE_SIZE = 112
    self.IMAGES_LENGTH = 150
    self.call_data()
def call_data(self):
    x = 10
    y = self.IMAGES_LENGTH
    z = self.IMAGE_SIZE
    return x,y,z

mainclass.py

---

from f1 import Getdata
x_train, y_train, z_train = Getdata.call_data(self)
print(x_train, y_train, z_train)

Answer 1

You firstly need to instantiate the class, and you do not have to pass the self parameter when calling a class function, modify f1.py to look like this:

from f1 import Getdata
getdata = Getdata()
x_train, y_train, z_train = getdata.call_data()
print(x_train, y_train, z_train)