CODEWITHSUNDEEP
oop
Drake_sb
Drake_sb

Reputation: 23

How do I delete an instance from a class by method in python?

The problem I'm facing is that I have person_1 Instance And I create a destroyed static method that should delete any instance That passed to it as y parameter but the instance still exists.

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I want person_1 to be removed and python should give an error message.

Thanks in advance

class population:
    """ This class is used 
    To adds and delete people """

    x = 0 

    def __init__(self,name): 
        self.name = name
        print(f'Initilaizing {name}\n Total_persons. {population.x}')

        population.x += 1  

    @classmethod
    # This class method is used to adds a new instance to the population class.
    def constructor(cls, y):
        population.x += 1 
        return cls(y)

    @staticmethod
    # This static method is used to remove an instance from the population class. 
    def destroyed(k): 
        del k
        population.x -= 1
        print(f'Total_persons after destroyed procedure. {population.x}')


person_1 = population('mohammed')
print(person_1.name)

population.destroyed(person_1)

print(person_1.name)

Upvotes: 1

Views: 723

Answers (1)

Jacob
Jacob

Reputation: 1840

The problem you're running into is caused by the fact that del k in your destroyed function is killing off only that instance of the object, not the one outside of the function scope. Python allows you to add functionality to a deleting an object with the __del__ function.

Implementing as such:

    def __del__(self):
        population.x -= 1
        print(f'Total_persons after destroyed procedure. {population.x}')

Will allow you to replace population.destroyed(person_1) with del person_1 to get the result you're looking for.

Upvotes: 1

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