I need to know how to kill/delete an object

Question

I’m with a program, in which there are some objects, which in this case are "blobs" or round beings, which through ids(identification numbers) can kill each other, but I can’t make the death actually happen, I tried to use in the class of blobs:

def death(self):
    del self

Calling in the code:

if hunter_pos == target_pos and hunter_id != target_id:
    blob.death()

Being hunter_pos the position of the "hunter", and hunter_id the identification number of the "hunter", the same for the target, or "target".

But that method didn’t work for me, so far it was the only method of killing objects I tried, so any other dirt is worth.

Obs:"did not work", in the sense that the object was not deleted/dead, ie the blob continues to appear on the screen.

Code :

import pygame
import random
import time
from blob import Blob

game_display = pygame.display.set_mode((800, 600))
pygame.display.set_caption('Blob World')
clock = pygame.time.Clock()

def draw_environment(blob_list):
    game_display.fill((255, 255, 255))
    for blob_dict in blob_list:
        for blob_id in blob_dict:
            blob = blob_dict[blob_id]
            hunter_pos = blob.position()
            hunter_id = blob_id
            for blob_id in blob_dict:
                blob = blob_dict[blob_id]
                target_pos = blob.position()
                target_id = blob_id
                if hunter_pos == target_pos and hunter_id != target_id:
                    blob.death()
                pygame.draw.circle(game_display, blob.color, [blob.x, blob.y], blob.size)
                blob.move()
                blob.check_boundaries()
    pygame.display.update()


def main():
    blue_blobs = dict(enumerate([Blob((0, 0, 255), 800, 600, 8, 4, 5, -5) for i in range(6)]))
    red_blobs = dict(enumerate([Blob((255, 0, 0), 800, 600, 8, 4, 5, -5) for i in range(5)]))
    while True:
        for event in pygame.event.get():
            if event.type == pygame.QUIT:
                pygame.quit()
                quit()

        draw_environment([blue_blobs, red_blobs])
        clock.tick(60)

if __name__ == '__main__':
    main()

Class of blobs:

import random

class Blob:
def __init__(self, color, x_boundary, y_boundary, size_max, size_min, mov_max, mov_min):
        self.x = random.randrange(0, x_boundary)
        self.y = random.randrange(0, y_boundary)
        self.size = random.randrange(size_min, size_max)
        self.color = color
        self.x_boundary = x_boundary
        self.y_boundary = y_boundary
        self.mov_min = mov_min
        self.mov_max = mov_max

    def move(self):
        self.x += random.randrange(self.mov_min, self.mov_max)
        self.y += random.randrange(self.mov_min, self.mov_max)

    def check_boundaries(self):
        if self.x < 0: self.x = 0
        elif self.x > self.x_boundary: self.x = self.x_boundary

        if self.y < 0: self.y = 0
        elif self.y > self.y_boundary: self.y = self.y_boundary

    def position(self):
        position_total =  self.x, self.y
        return position_total

    def size(self):
        return self.size

    def death(self):
        del self