🔒 call a father class when needed

[scenic sundial]

here is my code it's simple i just wanted to learn all topics i recently learned

def run_in_thread(fun):
    def wrapper(*args, **kwargs):
        thread = threading.Thread(target=fun, args=args, kwargs=kwargs)
        thread.start()

    return wrapper

class Operations:
    def __init__(self, num1 : float, num2 : float) -> None:
        self.num1 = num1
        self.num2 = num2

    @run_in_thread
    def plus(self) -> float:
        return self.num1 + self.num2
    
    @run_in_thread
    def minus(self) -> float:
        return self.num1 - self.num2
    
    @run_in_thread
    def multiply(self) -> float:
        return self.num1 * self.num2
    
class Calculator(Operations):
    def __init__(self, color : str) -> None:
        self.color = color
        self.operaions = ["PLUS", "MINUS", "MULTIPLY"]
        print(f"calculator running in {self.color} color")

    def console(self):
        while True:
            print(self.operaions)
            opr = input("select a operation> ")
            if opr in self.operaions:
                if opr == "PLUS":
                    num1 = input("num1: ")
                    num2 = input("num2: ")
                    super().__init__(num1, num2).plus()
                elif opr == "MINUS":
                    num1 = input("num1: ")
                    num2 = input("num2: ")
                    super().__init__(num1, num2).minus()
                elif opr == "MULTIPLY":
                    num1 = input("num1: ")
                    num2 = input("num2: ")
                    super().__init__(num1, num2).multiply()

            else:
                print("selected wrong operation!\nexiting...")
                exit()

Calculator('blue').console()```

[edgy anchor]

@scenic sundial

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[scenic sundial]

here is my code and that's the error i'm getting and idk what to do because in this artcile:
https://www.tutorialspoint.com/how-to-call-a-parent-class-method-in-python#:~:text=In Python%2C you can call,you to access its methods.
i can run the method in child class in need using super but idk how to dix this
here the error:

  File "C:\Users\bildiran.co\Documents\python_test\simple_calculator1.py", line 41, in console
    super().__init__(num1, num2).plus()
    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
AttributeError: 'NoneType' object has no attribute 'plus'

[frigid zodiac]

please can you add py to the beginning of your codeblock ?

[edgy anchor]

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[frigid zodiac]

super().__init__() is only calling the constructor from your parent class into your child class, it doesn't return anything (as constructors dont return anything)

after doing super().__init__(num1, num2)
you can do self.plus() etc...

[scenic sundial]

i fixed it

but now it's returning None

[frigid zodiac]

wdym ?

[scenic sundial]

while True:
            print(self.operaions)
            opr = input("select a operation> ")
            if opr in self.operaions:
                if opr == "PLUS":
                    num1 = input("num1: ")
                    num2 = input("num2: ")
                    super().__init__(num1, num2)
                    print(self.plus())
                elif opr == "MINUS":
                    num1 = input("num1: ")
                    num2 = input("num2: ")
                    super().__init__(num1, num2)
                    print(self.minus())
                elif opr == "MULTIPLY":
                    num1 = input("num1: ")
                    num2 = input("num2: ")
                    super().__init__(num1, num2)
                    print(self.multiply())

here is the fixed code

[frigid zodiac]

your prints return you none ?

[scenic sundial]

when i run code

[scenic sundial]

ye

[frigid zodiac]

oh sry i didnt see you called super().__init__ in a method

you have to call it in the constructor

so you can remove all your super().__init__ and just call it once in Calculator.__init__

[tender field]

and probably add a method to change the values of num1 & num2 in the Operator class

[frigid zodiac]

also you're not receiving the return value from the thread

[scenic sundial]

but look at code it doesn't return operation before accessing it from user input

[frigid zodiac]

it does though, you can see in your console the list of operations

[scenic sundial]

but i just want to send one operation from the list

not all

[frigid zodiac]

well you print all operations, it's only then that you choose given what the user has inputted

[scenic sundial]

ok

ok

[frigid zodiac]

super().__init__ only launches the constructor from the parent

it wont do all operations

[scenic sundial]

asfter that

[frigid zodiac]

but you need to init your parent to be able to use its attributes defined in its constructor

[scenic sundial]

rn

[frigid zodiac]

class Calculator(Operations):
    def __init__(self, color : str) -> None:
        self.color = color
        self.operaions = ["PLUS", "MINUS", "MULTIPLY"]
        super().__init__(num1, num2)
        print(f"calculator running in {self.color} color")

    def console(self):
        while True:
            print(self.operaions)
            opr = input("select a operation> ")
            if opr in self.operaions:
                if opr == "PLUS":
                    num1 = input("num1: ")
                    num2 = input("num2: ")
                    self.plus()
                elif opr == "MINUS":
                    num1 = input("num1: ")
                    num2 = input("num2: ")
                    self.minus()
                elif opr == "MULTIPLY":
                    num1 = input("num1: ")
                    num2 = input("num2: ")
                    self.multiply()

            else:
                print("selected wrong operation!\nexiting...")
                exit()

this wont print anything though because you don't receive the output from the thread

[scenic sundial]

hmm

[frigid zodiac]

good way to do it would be to return the thread in your wrapper function, and then do .join() after your operation and print that

[tender field]

actually this would raise a NameError

num1 and num2 are not defined as of yet when __init__ is called

[scenic sundial]

i'll fix it now

[scenic sundial]

ok i'm just confused a little bit

[frigid zodiac]

you mean in his original code ?

[scenic sundial]

in line 5

[tender field]

so probably call super with 0, 0 as args and implement this ^

[frigid zodiac]

ohw ait yes forgot something

[scenic sundial]

we don't have access to num1 and num2 but how could you parse them there?

[frigid zodiac]

class Calculator(Operations):
    def __init__(self, color : str) -> None:
        self.color = color
        self.operaions = ["PLUS", "MINUS", "MULTIPLY"]
        print(f"calculator running in {self.color} color")

    def console(self):
        while True:
            print(self.operaions)
            opr = input("select a operation> ")
            if opr in self.operaions:
                if opr == "PLUS":
                    self.num1 = input("num1: ")
                    self.num2 = input("num2: ")
                    self.plus()
                elif opr == "MINUS":
                    self.num1 = input("num1: ")
                    self.num2 = input("num2: ")
                    self.minus()
                elif opr == "MULTIPLY":
                    self.num1 = input("num1: ")
                    self.num2 = input("num2: ")
                    self.multiply()

            else:
                print("selected wrong operation!\nexiting...")
                exit()

this is better

[scenic sundial]

where is super

[frigid zodiac]

you don't need it if you define the attributes directly

also you'd have to convert the values

(but i'd do it within the operation methods)

[scenic sundial]

alr i'm so confused rn

[frigid zodiac]

well Calculator is a child of Operations meaning it inherits plus, minus and multiply from it

[scenic sundial]

you mean in methods them selves?

[frigid zodiac]

but those functions need num1 and num2 as attributes

[scenic sundial]

yes

[frigid zodiac]

so here i simply define self.num1 and self.num2 before calling the operation methods

[scenic sundial]

oh

oh

i didn't see it before

that's right

@frigid zodiac so i can just put None deafult in Operations class and define num1 and 2 after

[frigid zodiac]

for instance, but what you did also allow to do stuff like Operation(1, 3).sum()

which is also cool i guess

[scenic sundial]

hmm

cool cool

ty

let me see if it works

@frigid zodiac it's like instaed of using super
we just define parms with self

[frigid zodiac]

(i have to go sorry, ill let you in the hands of someone else, please note you still have to fix the threading issue)

[scenic sundial]

right?

[frigid zodiac]

yes

[scenic sundial]

alr thanks you

@frigid zodiac doesn't work again lmfao

[edgy anchor]

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