main.go

// +build linux,cgo darwin,cgo

package main

import "C"

import (
	"fmt"
	"strconv"
)

func init() {
	fmt.Println("loaded")
}

/*
fn maybe_panic(a: i32) -> String {
    if a == 0 {
        panic!("boom!")
    } else {
        a.to_string()
    }
}
*/

//export maybe_panic
func maybe_panic(a int64) *C.char {
	if a == 0 {
		panic("boom!")
	}
	s := strconv.Itoa(int(a))
	return C.CString(s)
}

func main() {}

// go build -buildmode=c-shared -o maybe_panic.so main.go

maybe_panic.py

#!/usr/bin/env python

import ctypes
from ctypes import c_int, c_char_p
import sys


lib = ctypes.CDLL('maybe_panic.so')
maybe_panic = lib.maybe_panic
maybe_panic.argtypes = [c_int]
maybe_panic.restype = c_char_p


def main():
    for arg in sys.argv[1:]:
        res = maybe_panic(int(arg))
        print(res)


if __name__ == '__main__':
    main()