python 类型大小

import sys
>>> sys.getsizeof(‘3‘)
38
>>> sys.getsizeof(‘32‘)
39
>>> sys.getsizeof(‘325‘)
40
>>> sys.getsizeof(325)
24
>>> sys.getsizeof(1)
24
>>> sys.getsizeof(10000003250)
24
>>> sys.getsizeof(1000000000000000)
24
>>> sys.getsizeof(1000000000000000090)
24
>>> sys.getsizeof(10000000000000000900)
36

import timeit
import sys
def f():
    a, b, c = 3,2,1
    return sys.getsizeof(a * 100 + b * 10 + c)

def g():
    a, b, c = 3,2,1
    return sys.getsizeof(str(a) + str(b) + str(c))

def f2():
    a, b, c = 3,2,1
    return a * 100 + b * 10 + c

def g2():
    a, b, c = 3,2,1
    return str(a) + str(b) + str(c)

print min(timeit.repeat(f2))
print min(timeit.repeat(g2))
print f()
print g()

0.296730041504
0.70504784584
24
40