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#!/usr/bin/env python3
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"""
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使用OpenWeatherMap API查询天气的示例代码
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需要先注册获取API密钥：https://openweathermap.org/api
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"""
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import requests
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import json
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import sys
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def get_weather_by_city(city_name, api_key, units="metric"):
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"""
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根据城市名称查询天气
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Args:
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city_name: 城市名称（如："Beijing"）
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api_key: OpenWeatherMap API密钥
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units: 温度单位，"metric"为摄氏度，"imperial"为华氏度
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Returns:
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天气数据的字典
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"""
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base_url = "http://api.openweathermap.org/data/2.5/weather"
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params = {
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"q": city_name,
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"appid": api_key,
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"units": units,
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"lang": "zh_cn" # 中文返回
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}
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try:
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response = requests.get(base_url, params=params, timeout=10)
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response.raise_for_status()
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return response.json()
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except requests.exceptions.RequestException as e:
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print(f"请求错误: {e}")
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return None
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except json.JSONDecodeError as e:
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print(f"JSON解析错误: {e}")
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return None
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def get_weather_by_coords(lat, lon, api_key, units="metric"):
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"""
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根据经纬度坐标查询天气
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Args:
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lat: 纬度
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lon: 经度
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api_key: OpenWeatherMap API密钥
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units: 温度单位
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Returns:
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天气数据的字典
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"""
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base_url = "http://api.openweathermap.org/data/2.5/weather"
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params = {
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"lat": lat,
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"lon": lon,
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"appid": api_key,
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"units": units,
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"lang": "zh_cn"
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}
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try:
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response = requests.get(base_url, params=params, timeout=10)
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response.raise_for_status()
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return response.json()
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except requests.exceptions.RequestException as e:
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print(f"请求错误: {e}")
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return None
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except json.JSONDecodeError as e:
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print(f"JSON解析错误: {e}")
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return None
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def display_weather(weather_data):
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"""
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显示天气信息
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Args:
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weather_data: 天气数据字典
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"""
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if not weather_data or "cod" in weather_data and weather_data["cod"] != 200:
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print("无法获取天气数据")
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if weather_data and "message" in weather_data:
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print(f"错误信息: {weather_data['message']}")
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return
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print("\n=== 天气信息 ===")
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print(f"城市: {weather_data.get('name', '未知')}")
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if "sys" in weather_data:
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country = weather_data["sys"].get("country", "")
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print(f"国家: {country}")
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if "main" in weather_data:
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main = weather_data["main"]
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print(f"温度: {main.get('temp', '未知')}°C")
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print(f"体感温度: {main.get('feels_like', '未知')}°C")
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print(f"最低温度: {main.get('temp_min', '未知')}°C")
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print(f"最高温度: {main.get('temp_max', '未知')}°C")
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print(f"湿度: {main.get('humidity', '未知')}%")
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print(f"气压: {main.get('pressure', '未知')} hPa")
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if "weather" in weather_data and len(weather_data["weather"]) > 0:
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weather = weather_data["weather"][0]
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print(f"天气状况: {weather.get('description', '未知')}")
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print(f"天气图标: http://openweathermap.org/img/wn/{weather.get('icon', '')}@2x.png")
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if "wind" in weather_data:
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wind = weather_data["wind"]
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print(f"风速: {wind.get('speed', '未知')} m/s")
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if "deg" in wind:
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print(f"风向: {wind.get('deg', '未知')}°")
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if "clouds" in weather_data:
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print(f"云量: {weather_data['clouds'].get('all', '未知')}%")
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if "visibility" in weather_data:
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visibility = weather_data["visibility"]
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if visibility >= 1000:
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print(f"能见度: {visibility/1000:.1f} km")
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else:
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print(f"能见度: {visibility} m")
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if "dt" in weather_data:
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from datetime import datetime
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dt = datetime.fromtimestamp(weather_data["dt"])
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print(f"数据时间: {dt.strftime('%Y-%m-%d %H:%M:%S')}")
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if "timezone" in weather_data:
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offset = weather_data["timezone"] / 3600
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print(f"时区: UTC{offset:+g}")
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def main():
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"""
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主函数：演示如何使用API
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"""
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print("OpenWeatherMap API 天气查询示例")
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print("=" * 40)
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# 您需要在这里填写您的API密钥
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API_KEY = "YOUR_API_KEY_HERE" # 请替换为您的实际API密钥
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if API_KEY == "YOUR_API_KEY_HERE":
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print("\n⚠️ 请先注册OpenWeatherMap并获取API密钥：")
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print(" https://openweathermap.org/api")
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print("\n注册步骤：")
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print("1. 访问 https://openweathermap.org/api")
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print("2. 点击 'Subscribe' 或 'Sign Up'")
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print("3. 注册免费账户（Current Weather Data API 免费套餐每天可调用60次）")
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print("4. 在控制台获取您的API密钥")
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print("\n获取API密钥后，请替换代码中的 'YOUR_API_KEY_HERE'")
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return
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# 示例：查询北京的天气
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print("\n示例1：查询北京天气")
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weather_data = get_weather_by_city("Beijing", API_KEY)
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if weather_data:
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display_weather(weather_data)
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# 示例：使用经纬度查询（纽约的坐标）
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print("\n" + "=" * 40)
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print("示例2：使用经纬度查询纽约天气")
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weather_data = get_weather_by_coords(40.7128, -74.0060, API_KEY)
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if weather_data:
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display_weather(weather_data)
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if __name__ == "__main__":
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main() |
