from sys import getsizeof class A(object): pass
class B: pass for x in (None, 1, 1L, 1.2, 'c', [], (), {}, set(), B, B(), A, A()):
print "{0:20s}\t{1:d}".format(type(x).__name__, sys.getsizeof(x)) NoneType 16
int 24
long 28
float 24
str 34
list 64
tuple 48
dict 272
set 224
classobj 96
instance 64
type 896
A 56