import gc

class myObj:
    a = []
    b = False

global o
o = myObj()

def test(name = False):
    global o
    if name: print("\nTesting after %s:" % name)
    gc.collect()
    o = myObj()
    print(o.a)
    print(o.b)

o.a.append(True)
o.a.append(3.141)
o.a.append("I'm still here!")
o.b = True

print("\nInitial values:")
test()

del o
test('object deletion') # result: array populated

if 0:
    del o.a # AttributeError: myObj instance has no attribute 'a'
    del o
    test('array deletion') # result: n/a

o.a = []
test('array re-init') # result: array populated

for item in o.a:
    del item
test('array per-item deletion') # result: array populated


while len(o.a):
    o.a.pop()
test('pop()') # result: array clear