国家代码 ISO 3166

复制import pycountry

# 根据二字码查找国家信息
code = "CN"
try:
    country = pycountry.countries.get(alpha_2=code)
    if country:
        print(f"名称: {country.name}")
        print(f"二字码: {country.alpha_2}")
        print(f"三字码: {country.alpha_3}")
        print(f"数字码: {country.numeric}")
    else:
        print(f"未找到代码 {code}")
except Exception as e:
    print(f"错误: {e}")

# 输出:
# 名称: China
# 二字码: CN
# 三字码: CHN
# 数字码: 156

复制package main

import (
	"fmt"
	"github.com/icza/gox/gox"
)

func main() {
	// 使用标准库查找国家代码
	// 实际项目中可引入 github.com/icza/gox 或自行实现映射
	countryMap := map[string]struct {
		Name, Alpha3, Numeric string
	}{
		"CN": {"China", "CHN", "156"},
		"US": {"United States", "USA", "840"},
	}

	code := "CN"
	if c, ok := countryMap[code]; ok {
		fmt.Printf("名称: %s\n", c.Name)
		fmt.Printf("二字码: %s\n", code)
		fmt.Printf("三字码: %s\n", c.Alpha3)
		fmt.Printf("数字码: %s\n", c.Numeric)
	} else {
		fmt.Printf("未找到代码 %s\n", code)
	}
}

复制// 使用 world-countries 包（npm install world-countries）
const countries = require('world-countries');

const code = 'CN';
const country = countries.find(c => c.cca2 === code);

if (country) {
  console.log(`名称: ${country.name.common}`);
  console.log(`二字码: ${country.cca2}`);
  console.log(`三字码: ${country.cca3}`);
  console.log(`数字码: ${country.ccn3}`);
} else {
  console.log(`未找到代码 ${code}`);
}

// 输出:
// 名称: China
// 二字码: CN
// 三字码: CHN
// 数字码: 156