作者 |?豆豆
來源 | Python技術(shù)

import osimport psutil

# 打印當(dāng)前程序占用的內(nèi)存大小def print_memory_info(name):    pid = os.getpid()    p = psutil.Process(pid)
    info = p.memory_full_info()    MB = 1024 * 1024    memory = info.uss / MB    print('%s used %d MB' % (name, memory))
# 測(cè)試函數(shù)def foo():    print_memory_info("foo start")    length = 1000 * 1000    list = [i for i in range(length)]    print_memory_info("foo end")

foo()print_memory_info("main end")
### 輸出結(jié)果foo start used 6 MBfoo end used 55 MBmain end used 10 MB

def foo():    print_memory_info("foo start")    length = 1000 * 1000    list = [i for i in range(length)]    print_memory_info("foo end")    return list
### 輸出結(jié)果foo start used 6 MBfoo end used 55 MBmain end used 55 MB

• 對(duì)象被創(chuàng)建（num=2）
• 對(duì)象被引用（count=num）
• 對(duì)象作為參數(shù)傳遞到函數(shù)內(nèi)部
• 對(duì)象作為一個(gè)元素添加到容器中

• 對(duì)象的別名被顯式銷毀（del num）
• 對(duì)象的別名被賦予新的對(duì)象（num=30）
• 對(duì)象離開它的作用域（函數(shù)局部變量）
• 從容器中刪除對(duì)象，或者容器被銷毀

def foo():    print_memory_info("foo start")    length = 1000 * 1000    list_a = [i for i in range(length)]    list_b = [i for i in range(length)]    list_a.append(list_b)    list_b.append(list_a)    print_memory_info("foo end")    return list
### 輸出結(jié)果foo start used 6 MBfoo end used 93 MBmain end used 93 MB

四、

代碼地址

示例代碼：https://github.com/JustDoPython/python-100-day/tree/master/day-111