[python] How to delete an instantiated object Python?

I am relatively new to object oriented programming and I cannot figure out how to delete an instantiated object in python. Any help would be much appreciated.

        if self.hit_paddle(pos) == True or self.hit_paddle2(pos) == True:
            bar = bar + 1
        if bar == 1:
            global barbox1
            barbox1 = barfill(canvas)
            barbox1.canvas.move(barbox1.id, 253, 367)
        if bar == 2:
            global barbox2
            barbox2 = barfill(canvas)
            barbox2.canvas.move(barbox2.id, 293, 367)
        if bar == 3:
            global barbox3
            barbox3 = barfill(canvas)
            barbox3.canvas.move(barbox3.id, 333, 367)
        if bar == 4:
            global barbox4
            barbox4 = barfill(canvas)
            barbox4.canvas.move(barbox4.id, 373, 367)
        if bar == 5:
            global barbox5
            barbox5 = barfill(canvas)
            barbox5.canvas.move(barbox5.id, 413, 367)
            bar = 0
            time.sleep(0.2)
            barbox1 = None
            barbox2 = None
            barbox3 = None
            barbox4 = None
            barbox5 = None

That is the code, the main thing I was trying in order to delete the objects was barbox1 = None, but that doesn't seem to work.

What do you mean by delete? In Python, removing a reference (or a name) can be done with the del keyword, but if there are other names to the same object that object will not be deleted.

--> test = 3
--> print(test)
3
--> del test
--> print(test)
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
NameError: name 'test' is not defined

compared to:

--> test = 5
--> other is test  # check that both name refer to the exact same object
True
--> del test       # gets rid of test, but the object is still referenced by other
--> print(other)
5

object.__del__(self) is called when the instance is about to be destroyed.

>>> class Test:
...     def __del__(self):
...         print "deleted"
... 
>>> test = Test()
>>> del test
deleted

Object is not deleted unless all of its references are removed(As quoted by ethan)

Also, From Python official doc reference:

del x doesn’t directly call x.del() — the former decrements the reference count for x by one, and the latter is only called when x‘s reference count reaches zero