一、编写golang开发的共享模块

libdemo.go

//libdemo.go

package main

import (

	"C"

	"fmt"

)

//export Foo

func Foo(a, b int) int {

	return a + b

}

//export Bar

func Bar(s *C.char) {

	fmt.Println("Hello, ", C.GoString(s))

}

func main() {

	Bar(C.CString("demo你好"))

}

执行命令构建模块

go build -o libdemo.dll -buildmode=c-shared main.go

 

二、python中调用模块

golang_libdemo.py

from ctypes import *
libdemo = cdll.LoadLibrary(r'C:\workspaces\goWorks\libdemo\libdemo.dll')
print(libdemo.Foo(1,2))
print(libdemo.Bar(c_char_p('你好'.encode())))

 

执行结果：

3
Hello,  你好
0

关联阅读：

Go build模式之c-archive，c-shared，linkshared

https://davidchan0519.github.io/2019/04/05/go-buildmode-c/

golang和python互相调用

https://www.cnblogs.com/dhcn/p/12044521.html

Windows 下 Python3.6 调用GCC C 动态库例子

Windows 下GCC编译C程序调用Golang静态库和C动态库

三、Python与C类型映射

https://docs.python.org/3.8/library/ctypes.html#ctypes.c_char

ctypes defines a number of primitive C compatible data types:

ctypes type	C type	Python type
c_bool	_Bool	bool (1)
c_char	char	1-character bytes object
c_wchar	wchar_t	1-character string
c_byte	char	int
c_ubyte	unsigned char	int
c_short	short	int
c_ushort	unsigned short	int
c_int	int	int
c_uint	unsigned int	int
c_long	long	int
c_ulong	unsigned long	int
c_longlong	__int64 or long long	int
c_ulonglong	unsigned __int64 or unsigned long long	int
c_size_t	size_t	int
c_ssize_t	ssize_t or Py_ssize_t	int
c_float	float	float
c_double	double	float
c_longdouble	long double	float
c_char_p	char * (NUL terminated)	bytes object or None
c_wchar_p	wchar_t * (NUL terminated)	string or None
c_void_p	void *	int or None

 

golang和python之间，当前可以通过golang的cgo和python的ctypes，把golang对象和python对象分别转换为C对象，从而通过编译和调用c的动态连接库，完成交互。