main.go

package main

import (
	"fmt"
	"log"

	cid "github.com/ipfs/go-cid"
)

func main() {
	data := []byte{
		0x0, // the Multibase identity prefix (0x00)
		0x1, 0x71, 0x12, 0x20, 0xb6, 0xf0, 0x94, 0x7e, 0x0,
		0xac, 0x4c, 0x9b, 0xc9, 0xa1, 0x1c, 0x1, 0x6a, 0x4a, 0xa9,
		0x9d, 0x33, 0x8d, 0xd6, 0x79, 0xd4, 0x33, 0x90, 0x10, 0xce,
		0xb, 0x0, 0x27, 0xe0, 0xce, 0x5c, 0xc6,
	}

	_, cid, err := cid.CidFromBytes(data[1:])
	if err != nil {
		log.Fatal(err)
	}
	fmt.Println(cid)
}

main.py

# pip install py-multiformats-cid
from multiformats_cid import from_bytes


def main():
    cidbytes = (b'\x00\x01\x71\x12\x20\xb6\xf0\x94\x7e\x00'
                b'\xac\x4c\x9b\xc9\xa1\x1c\x01\x6a\x4a\xa9'
                b'\x9d\x33\x8d\xd6\x79\xd4\x33\x90\x10\xce'
                b'\x0b\x00\x27\xe0\xce\x5c\xc6')

    print(from_bytes(cidbytes[1:]))


if __name__ == '__main__':
    main()