如何在Python中获得对象在内存中占用的大小?
当前回答
这可能不是最相关的答案,但我只对对象存储和检索感兴趣。因此将对象转储为pickle并检查pickle的大小就足够了
其他回答
这可能不是最相关的答案,但我只对对象存储和检索感兴趣。因此将对象转储为pickle并检查pickle的大小就足够了
我用这个技巧…May在小对象上不准确,但我认为对于复杂对象(如pygame surface)比sys.getsizeof()更准确。
import pygame as pg
import os
import psutil
import time
process = psutil.Process(os.getpid())
pg.init()
vocab = ['hello', 'me', 'you', 'she', 'he', 'they', 'we',
'should', 'why?', 'necessarily', 'do', 'that']
font = pg.font.SysFont("monospace", 100, True)
dct = {}
newMem = process.memory_info().rss # don't mind this line
Str = f'store ' + f'Nothing \tsurface use about '.expandtabs(15) + \
f'0\t bytes'.expandtabs(9) # don't mind this assignment too
usedMem = process.memory_info().rss
for word in vocab:
dct[word] = font.render(word, True, pg.Color("#000000"))
time.sleep(0.1) # wait a moment
# get total used memory of this script:
newMem = process.memory_info().rss
Str = f'store ' + f'{word}\tsurface use about '.expandtabs(15) + \
f'{newMem - usedMem}\t bytes'.expandtabs(9)
print(Str)
usedMem = newMem
在我的windows 10, python 3.7.3,输出是:
store hello surface use about 225280 bytes
store me surface use about 61440 bytes
store you surface use about 94208 bytes
store she surface use about 81920 bytes
store he surface use about 53248 bytes
store they surface use about 114688 bytes
store we surface use about 57344 bytes
store should surface use about 172032 bytes
store why? surface use about 110592 bytes
store necessarily surface use about 311296 bytes
store do surface use about 57344 bytes
store that surface use about 110592 bytes
Pympler包的asizeof模块可以做到这一点。
使用方法如下:
from pympler import asizeof
asizeof.asizeof(my_object)
不像系统。Getsizeof,它适用于你自己创建的对象。它甚至可以与numpy一起工作。
>>> asizeof.asizeof(tuple('bcd'))
200
>>> asizeof.asizeof({'foo': 'bar', 'baz': 'bar'})
400
>>> asizeof.asizeof({})
280
>>> asizeof.asizeof({'foo':'bar'})
360
>>> asizeof.asizeof('foo')
40
>>> asizeof.asizeof(Bar())
352
>>> asizeof.asizeof(Bar().__dict__)
280
>>> A = rand(10)
>>> B = rand(10000)
>>> asizeof.asizeof(A)
176
>>> asizeof.asizeof(B)
80096
正如前面提到的,
可以通过设置option code=True来包含类、函数、方法、模块等对象的(字节)代码大小。
如果你需要实时数据的其他视图,请选择Pympler
模块muppy用于在线监控Python应用程序 和模块类跟踪器提供的生命周期的离线分析 选择Python对象。
下面是我根据之前对所有变量的列表大小的回答编写的一个快速脚本
for i in dir():
print (i, sys.getsizeof(eval(i)) )
用系统就行了。sys模块中定义的Getsizeof函数。
sys.getsizeof(object[, default]): Return the size of an object in bytes. The object can be any type of object. All built-in objects will return correct results, but this does not have to hold true for third-party extensions as it is implementation specific. Only the memory consumption directly attributed to the object is accounted for, not the memory consumption of objects it refers to. The default argument allows to define a value which will be returned if the object type does not provide means to retrieve the size and would cause a TypeError. getsizeof calls the object’s __sizeof__ method and adds an additional garbage collector overhead if the object is managed by the garbage collector. See recursive sizeof recipe for an example of using getsizeof() recursively to find the size of containers and all their contents.
python 3.0中的用法示例:
>>> import sys
>>> x = 2
>>> sys.getsizeof(x)
24
>>> sys.getsizeof(sys.getsizeof)
32
>>> sys.getsizeof('this')
38
>>> sys.getsizeof('this also')
48
如果你在python < 2.6并且没有sys. exe。Getsizeof可以使用这个扩展模块。但从来没用过。
推荐文章
- 证书验证失败:无法获得本地颁发者证书
- 当使用pip3安装包时,“Python中的ssl模块不可用”
- 无法切换Python与pyenv
- Python if not == vs if !=
- 如何从scikit-learn决策树中提取决策规则?
- 为什么在Mac OS X v10.9 (Mavericks)的终端中apt-get功能不起作用?
- 将旋转的xtick标签与各自的xtick对齐
- 为什么元组可以包含可变项?
- 如何合并字典的字典?
- 如何创建类属性?
- 不区分大小写的“in”
- 在Python中获取迭代器中的元素个数
- 解析日期字符串并更改格式
- 使用try和。Python中的if
- 如何在Python中获得所有直接子目录