运行完代码后，内存过高，怎么释放内存？

Question

下面案例 仅是简单的举例；
实际的代码（for j in l ,这一段非常多），运行完一次后，电脑内存达到99.99%（电脑内存为48g）
需求为：运行完一次后，就释放内存，以便第二个时间点在运行；

import datetime
 
def fun(i10):
    l = [1, 2, 3,4]
    a=[1,2,3]
    for j in l:
        if j>a[i10]:
            print(j
   #每运行完一次，释放内存
 
d = []
times = ["22:22:00" , "22:22:05" , '22:22:10']
while True:
    now = datetime.datetime.now()
    time = datetime.datetime.strftime(now, '%H:%M:%S')
    if time not in d and time in times:
        d.append(time)
        fun(times.index(time))
        if len(d) == len(times):
            break

Answer 1

import datetime
import time as t

def fun(i10):
    l = [1, 2, 3, 4]
    a = [1, 2, 3]
    for j in l:
        if j > a[i10]:
            print(j,end=' ')
    print()
# 每运行完一次，释放内存
d = []
times = ["13:09:00", "13:09:01", '13:09:02']
while True:
    t.sleep(0.2)
    now = datetime.datetime.now()
    time = datetime.datetime.strftime(now, '%H:%M:%S')
    if time not in d and time in times:
        d.append(time)
        fun(times.index(time))
        if len(d) == len(times):
            break