파이썬 메모리 관리의 모든 것: 참조 횟수 계산과 가비지 컬렉션의 작동 원리

import sys

# Create an object - reference count is 1
my_list = [1, 2, 3]
print(f"Reference count: {sys.getrefcount(my_list)}")

# Create another reference - count increases
another_ref = my_list
print(f"Reference count: {sys.getrefcount(my_list)}")

# Delete one reference - count decreases
del another_ref
print(f"Reference count: {sys.getrefcount(my_list)}")

class Node:
    def __init__(self, name):
        self.name = name
        self.reference = None

node1 = Node("Node 1")
node2 = Node("Node 2")

# Now create the circular reference
node1.reference = node2
node2.reference = node1

# Delete our variables
del node1
del node2

import gc

# Get collection thresholds
thresholds = gc.get_threshold()
print(f"Collection thresholds: {thresholds}")

# Get current collection counts
counts = gc.get_count()
print(f"Current counts: {counts}")

# Manually trigger collection
collected = gc.collect()
print(f"Collected {collected} objects")