Codexon

People have wanted to know the size of Python objects for a long time, but before they had to dig into the source code. With the new function sys.getsizeof, you don’t have to.

Here are a list of sizes in bytes of common Python 2.6 datatypes. (containers are empty).

Type

32-bit

64-bit


int
 12
 24


long (1L)
 16
 32


float
 16
 24


tuple
 28
 56


list
 36
 72


dict
140
280


old class
 48
 96


old instance
 36
 72


new class
452
904


new instance
 32
 64


function
 60
120


lambda
 60
120


module
 28
 56


ascii 'a'
 25
 41


unicode 'a'
 28
 56


ascii 'ab'
 26
 42


unicode 'ab'
 30
 60

If you want to see a neat application of getsizeof, take a look at this hack.

int         12

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