人為的にメモリリークさせる例

sample_leak.py

import threading
import tracemalloc
import time

tracemalloc.start()

class Sub(threading.Thread):
    def run(self):
        while True:
            time.sleep(3)
            stats = tracemalloc.take_snapshot().statistics('lineno')

            print('---------------------------------')
            for line in stats[:30]:
                print(line)

tm = Sub()
tm.start()

ref = []

def leaker():
    dat = 1
    ref.append(dat)
    return None

for _ in range(1000000):
    leaker()