[Python] Python logging MemoryHandler leaks memory?

In a main.py file I have following code:

import time

from v1 import log, ServiceLogger
from logging.handlers import MemoryHandler


class Service:
h = MemoryHandler(1000)
id = None
log = None

def __init__(self, id: int):
self.id = id
self.log = ServiceLogger(log)
log.addHandler(self.h)

def do(self):
print("Do some job per service!")


def service_exec():
service = Service(id=4)
service.do()


if __name__ == '__main__':
while True:
for i in range(10):
service_exec()
time.sleep(1)


And then v1.py has following content:

import logging

log = logging.getLogger('.'.join(__name__.split('.')[:-1]))


class ServiceLogger(logging.LoggerAdapter):
def log(self, level, msg, *args, **kwargs):
print("Custom logger hello!")


The problem is that over a time (~15-30 mins) I noticed that my computer memory increases over a period, and continue to grow forever with around 15-30 mins intervals. I used top -p <PID> to track the "VIRT RES SHR" resources, in particular that "RES". However, if I remove this log.addHandler(self.h) code snippet, then memory doesn't grow (so I left computer for couple hours and no grow has been noticed). Could somebody hint me what kind of problem could this be and how to solve it?

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