1, Pointer
>>> cp = c_char_p('Hello, world!')
>>> cp
c_char_p(139667889814172)
>>> print cp.value
Hello, world!
!note:
char*: c_char_p
2, Struct
from ctypes import *
class beer_recipe(Structure):
_fields_ = [
('amt_barley', c_int),
('amt_water', c_int),
]
my_beer = beer_recipe(10, 20)
print my_beer.amt_barley, my_beer.amt_water
out: 10 20
3, Union
from ctypes import *
class barley_amount(Union):
_fields_ = [
('barley_int', c_int),
('barley_char', c_char * 8)
]
my_barley = barley_amount(66)
print my_barley.barley_int, my_barley.barley_char
out: 66 B
4, SO (Share Object)
from ctypes import *
libc = CDLL('libip6tc.so.0.1.0')
message = 'Hello, world!'
libc.printf('Testing: %s', message)
out: Testing: Hello, world!
!note: the program above run on ubuntu LTS 14.04 Operating System
