class Test:
    def __init__(self, headers=['1','2'], oheaders=['3','4']):
        print('Creating Object')
        self.headers = headers
        self.oheaders = oheaders
        self.merge_list()
    def merge_list(self):
        merge_list = self.headers
        merge_list[1:1] = self.oheaders
        print(merge_list)
    def __del__(self):
        print('Destructing Object')
        self.headers = []
        self.oheaders = []


# Normal Behaviour
print("normal behaviour")
for i in range(4):
    test = Test(headers=['1','2'], oheaders=['3','4'])
    del test

# Bug
print("buggy behaviour")
for i in range(4):
    test = Test()
    del test
    gc.collect()