要编辑Ctypes结构的缓冲区,可以按照以下步骤进行:
from ctypes import *
class MyStruct(Structure):
_fields_ = [("a", c_int),
("b", c_float),
("c", c_char_p)]
my_struct = MyStruct()
my_struct.a = 10
my_struct.b = 3.14
my_struct.c = create_string_buffer(b"hello")
my_struct.a = 20
my_struct.b = 2.718
my_struct.c = create_string_buffer(b"world")
完整的示例代码如下:
from ctypes import *
class MyStruct(Structure):
_fields_ = [("a", c_int),
("b", c_float),
("c", c_char_p)]
my_struct = MyStruct()
my_struct.a = 10
my_struct.b = 3.14
my_struct.c = create_string_buffer(b"hello")
print("Before editing:")
print(f"a = {my_struct.a}")
print(f"b = {my_struct.b}")
print(f"c = {my_struct.c.value.decode()}")
my_struct.a = 20
my_struct.b = 2.718
my_struct.c = create_string_buffer(b"world")
print("\nAfter editing:")
print(f"a = {my_struct.a}")
print(f"b = {my_struct.b}")
print(f"c = {my_struct.c.value.decode()}")
运行以上代码将输出:
Before editing:
a = 10
b = 3.140000104904175
c = hello
After editing:
a = 20
b = 2.718
c = world
这样就可以通过编辑缓冲区来修改Ctypes结构的数据。