Python深getsizeof列表内容? [英] Python deep getsizeof list with contents?

问题描述

sys.getsizeof( 10000*[x] )使我感到惊讶 不论x:0，"a"，1000 *"a"，{}，都是40036.
是否有deep_getsizeof 哪个适当考虑了共享内存的元素?
(问题来自查看内存数据库表，例如 range(1000000)->省名:list或dict?)
(在Mac PPC上，Python是2.6.4.)

I was surprised that sys.getsizeof( 10000*[x] ) is 40036 regardless of x: 0, "a", 1000*"a", {}.
Is there a deep_getsizeof which properly considers elements that share memory ?
(The question came from looking at in-memory database tables like range(1000000) -> province names: list or dict ?)
(Python is 2.6.4 on a mac ppc.)

已添加: 10000 * ["密西西比]是10000个指向一个"密西西比的指针， 正如几个人指出的那样.试试这个:

Added: 10000*["Mississippi"] is 10000 pointers to one "Mississippi", as several people have pointed out. Try this:

nstates = [AlabamatoWyoming() for j in xrange(N)]

其中AlabamatoWyoming()->字符串"Alabama" .."Wyoming". 什么是deep_getsizeof(nstates)?
(我们怎么知道?

where AlabamatoWyoming() -> a string "Alabama" .. "Wyoming". What's deep_getsizeof(nstates) ?
(How can we tell ?

• 适当的deep_getsizeof:困难，〜gc跟踪器
• 从总虚拟机中估算
• 关于python实现的内在知识
• 猜.

添加了25jan: 另请参见 when-does-python-allocate-new-memory- for-identical-strings

Added 25jan: see also when-does-python-allocate-new-memory-for-identical-strings

推荐答案

看看 guppy/heapy ;我自己并没有玩太多，但是我的一些同事已经将它用于内存分析，并取得了良好的结果.

Have a look at guppy/heapy; I haven't played around with it too much myself, but a few of my co-workers have used it for memory profiling with good results.

文档可能会更好，但是此方法在解释基本概念方面做得不错.

The documentation could be better, but this howto does a decent job of explaining the basic concepts.

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