1. python 用关键字 ctypes 来导入dll。
有三种导入dll的方式:
如:
1 from ctypes import *
2
3 msvcrt = cdll.msvcrt
4 message_string = " hello world\n "
5 msvcrt.printf( " testing: %s " , message_string)
调用c运行库的printf 函数。
2. c&c++数据类型和python数据类型的映射关系
3. 引用传值
byref()返回一个变量的指针,所以在调用的时候只需: function(byref(param));
4. struct 和unins
c中
1 struct beef_recipe
2 {
3 int amt_barley;
4 int amt_water;
5 }
6
7
8
9 unin{
10 long barley_long;
11 int barley_int;
12 char barley_char[ 8 ];
13 } barley_amount;
python 中:
1 class beer_recipe(Structure):
2 _fields_ = [
3 ( " amt_barley " , c_int),
4 ( " amt_water " , c_int)
5 ]
6
7 class barley_amount(Union):
8 _fields = [
9 ( " barley_long " , c_long),
10 ( " barley_int " , c_int),
11 ( " barley_char " , c_char * 8 ),
12 ]