How to call Go function from Python

Question

I am trying to call go lang function from python when I call my python program I am seeing the following error. I am referring to the Go to pythn link.

Python Program

    from ctypes import *
    def call_go_function():

        lib = cdll.LoadLibrary("./awesome.so")
        lib.Add.argtypes = [c_longlong, c_longlong]
        print( lib.Add(12,99)) 

    call_go_function()

Go Program

package main
import "C"
import (

"sync"
 )
 var count int
 var mtx sync.Mutex
 //export Add
 func Add(a, b int) int { return a + b }
 func main() {}

You are using Windows, the tutorial you are following uses Linux/Unix. Perhaps you can apply the tutorial in a Docker container or VM. — Seaskyways
– Seaskyways, Commented Jul 19, 2019 at 6:49
Please don't include images of text. They are hard to read (and impossible to read if you rely on a screen reader), and they are not searchable and cannot be indexed. Instead, copy and paste the text directly into the question. — Jonathan Hall
– Jonathan Hall, Commented Jul 19, 2019 at 8:42

Florian Zwoch · Accepted Answer · 2019-07-19 11:24:41Z

2

From the Python path it looks like this is a 32-bit Python version. You cannot mix 32-bit and 64-bit user-space code.

So I guess you need to either:

Rebuild your Go code as a 32-bit DLL (see GOARCH=386) or
Install and run a 64-bit Python version.

answered Jul 19, 2019 at 11:24

Florian Zwoch

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平田裕 · Accepted Answer · 2020-01-01 13:49:11Z

1

Maybe it's an environment. Try running a simple program.

from ctypes import *
lib = cdll.LoadLibrary("./func.so")
r=lib.fun(10,20)
print(r)

package main
import "C"
//export fun
func fun(x int,y int) int{
    return x+y
}

func main(){}

>go build -o func.so -buildmode=c-shared func.go
>python test.py
30

answered Jan 1, 2020 at 13:49

平田裕

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How to call Go function from Python

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Maybe it's an environment. Try running a simple program.

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