populationList = []
for i in range(0, 2000)
    populationList.append(myObject).

populationList = []

>>> class Foo:
...     def __init__(self, x):
...         self.x = x
...     def __del__(self):
...         print(self.x, 'deleted')
...
>>> populationList = []
>>> for i in range(5):
...     populationList.append(Foo(i))
...
>>> populationList = []
4 deleted
3 deleted
2 deleted
1 deleted
0 deleted