Python论坛的帖子：

Tue Aug 10 15:54:28 HKT 2004

Hollo limodou:

  不能说不关心哪？！
Python 在嵌入设置中也有移植的！性能的追求是一切语言不能忽略的是也乎，不过 Python 以另外的方式来完成，当然也有提高的余地，有忐者可以开始探险哪！？

/******** [2004-08-10]15:52:50 ; limodou wrote:

limodou> tocer,您好！

limodou> 	因为使用Python根本不关心这个。不要总把C/C++里的概念在Python中使用，因为它们根本就不一样。

limodou> ======= 2004-08-10 15:33:00 您在来信中写道：=======

>>没想到这么难解决
>>
>>----- Original Message ----- 
>>From: "gentoo.cn" <gentoo.cn at 126.com>
>>To: <python-chinese at lists.python.cn>
>>Sent: Tuesday, August 10, 2004 12:53 PM
>>Subject: Re: [python-chinese] 如何测量一个变量或者常量在内存中的大小
>>
>>
>>> 找到一个相关的讨论
>>> http://www.egenix.com/mailman-archives/egenix-users/2002-November/000156.html
>>> 
>>> gentoo.cn wrote:
>>> 
>>> >我的意思是：是不是可以通过计算一个Object的Struct来猜测这个Object的大小？
>>> >比如c='a', string="abcd"
>>> >那么c的类型是1c, string的类型是4c
>>> >calcsize('c')=1
>>> >calcsize('L')=4
>>> >也就是说一个数值型的对象占用4Bytes内存空间，一个字符型对象占用1Bytes内存
>>> >空间？
>>> >对于string="abcd"这个对象，类型是4c所以占用4Bytes内存空间？
>>> >不知道Python如何考虑对齐的（也许他最小的单位是1Bytes所以都是8bit的倍数，
>>> >这样就对齐了？）
>>> >
>>> >大家都来讨论讨论啊。
>>> >
>>> >
>>> >
>>> >limodou wrote:
>>> >
>>> >  
>>> >
>>> >>gentoo.cn,您好！
>>> >>
>>> >>
>>> 那个不是内存的大小吧。而是对应的struct的大小。因为在python中都是对象，而不仅仅是数据结构。不知道:你想知道内存大小有什么用？
>>> >>
>>> >>======= 2004-08-10 11:05:42 您在来信中写道：=======
>>> >>
>>> >> 
>>> >>
>>> >>    
>>> >>
>>> >>>import struct
>>> >>>struct.pack
>>> >>>struct.calcsize ?
>>> >>>
>>> >>>难道使用这个方法吗？
>>> >>>我也想知道有什么方法来计算对象的size
>>> >>>
>>> >>>*calcsize*( fmt)
>>> >>>
>>> >>>  Return the size of the struct (and hence of the string)
>>> >>>  corresponding to the given format. 
>>> >>>
>>> >>>Format characters have the following meaning; the conversion between C
>>> >>>and Python values should be obvious given their types:
>>> >>>
>>> >>>*Format* *C Type* *Python* *Notes*
>>> >>>x pad byte no value 
>>> >>>c char string of length 1 
>>> >>>b signed char integer 
>>> >>>B unsigned char integer 
>>> >>>h short integer 
>>> >>>H unsigned short integer 
>>> >>>i int integer 
>>> >>>I unsigned int long 
>>> >>>l long integer 
>>> >>>L unsigned long long 
>>> >>>q long long long (1)
>>> >>>Q unsigned long long long (1)
>>> >>>f float float 
>>> >>>d double float 
>>> >>>s char[] string 
>>> >>>p char[] string 
>>> >>>P void * integer 
>>> >>>
>>> >>>
>>> >>>tocer wrote:
>>> >>>
>>> >>>   
>>> >>>
>>> >>>      
>>> >>>
>>> >>>>比如：
>>> >>>>a=[1,2,3]
>>> >>>>测试 a 在内存中的所占的字节数
>>> >>>>
>>> >>>>------------------------------------------------------------------------
>>> >>>>
>>> >>>>_______________________________________________
>>> >>>>python-chinese list
>>> >>>>python-chinese at lists.python.cn
>>> >>>>http://python.cn/mailman/listinfo/python-chinese
>>> >>>>
>>> >>>>
>>> >>>>     
>>> >>>>
>>> >>>>        
>>> >>>>
>>> >>>_______________________________________________
>>> >>>python-chinese list
>>> >>>python-chinese at lists.python.cn
>>> >>>http://python.cn/mailman/listinfo/python-chinese
>>> >>>
>>> >>>   
>>> >>>
>>> >>>      
>>> >>>
>>> >>= = = = = = = = = = = = = = = = = = = =
>>> >> 
>>> >>
>>> >>　　　　　　　　致
>>> >>礼！
>>> >>
>>> >> 
>>> >>　　　　　　　　limodou
>>> >>　　　　　　　　chatme at 263.net
>>> >>　　　　　　　　　　2004-08-10
>>> >>
>>> >> 
>>> >>
>>> >>------------------------------------------------------------------------
>>> >>
>>> >>_______________________________________________
>>> >>python-chinese list
>>> >>python-chinese at lists.python.cn
>>> >>http://python.cn/mailman/listinfo/python-chinese
>>> >> 
>>> >>
>>> >>    
>>> >>
>>> >
>>> >_______________________________________________
>>> >python-chinese list
>>> >python-chinese at lists.python.cn
>>> >http://python.cn/mailman/listinfo/python-chinese
>>> >
>>> >
>>> >  
>>> >
>>> 
>>> _______________________________________________
>>> python-chinese list
>>> python-chinese at lists.python.cn
>>> http://python.cn/mailman/listinfo/python-chinese
>>> _______________________________________________
>>python-chinese list
>>python-chinese at lists.python.cn
>>http://python.cn/mailman/listinfo/python-chinese
>>

limodou> = = = = = = = = = = = = = = = = = = = =

limodou> 　　　　　　　　致
limodou> 礼！

limodou> 　　　　　　　　limodou
limodou> 　　　　　　　　chatme at 263.net
limodou> 　　　　　　　　　　2004-08-10

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标题：Re[3]: [python-chinese] 如何测量一个变量或者常量在内存中的大小