package main

import (
	"fmt"
	"regexp"
)

var namedRegex = regexp.MustCompile(`姓名：(?P<name>[\p{Han}a-zA-Z0-9]+)，城市：(?P<city>[\p{Han}a-zA-Z0-9]+)`)

func main() {
	text := "姓名：孙三苗，城市：北京"
	match := namedRegex.FindStringSubmatch(text)
	for i, name := range namedRegex.SubexpNames() {
		if i > 0 && name != "" {
			fmt.Printf("%s：%s\n", name, match[i])
		}
	}
}