Can't use go shared library in my python file

Hello hello, php editor Xiaoxin, recently a reader encountered a problem when using python files. He was unable to use the go shared library in his python files. This issue may be due to some configuration or environment issues. Before solving this problem, you can try to check your environment variables and path settings to ensure that your go shared library is installed correctly and the path is set correctly. Alternatively, you can also try reinstalling or updating your go shared library to ensure it is compatible with your python version. If the problem persists, you may consider seeking help in the relevant development community or forum, where there may be other developers who have encountered similar problems and can provide solutions. Hope this information is helpful to you!

Question content

I have a file named main.go, which defines a function named test. I want to be able to call this function from my python script.

main.go

package main

import "C"

// export test
func test() int {
    return 1
}

func main() {}

Compile: go build -o lib.so -buildmode=c-shared main.go

main.py

import ctypes

mylib = ctypes.CDLL("./lib.so")


result = mylib.test()


print(result)

When I run the python program, I get the following error: AttributeError: ./lib.so: undefined symbol: test

What did I miss?

Go version go version go1.21.3 linux/amd64

Python version: Python 3.10.12

I tried updating Go (previously my version was 1.21.1)

Workaround

Everything is correct except //export There is an extra space causing the problem

package main

import "C"

//export test      <------ remove the extra space here
func test() int {
    return 1
}

func main() {}

python main.py

Output:

1

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