先看下效果图：
用到的模块：
- PyMySQL
- requests
- threading
- wxpy
要实现下面的示例，首先是有两大块中央
- 获取天气信息
- 通过微信将天气信息发送进来
而获取天气信息又包含几个小的须要留神的中央
获取天气信息
- 获取天气信息的接口
- 获取天气信息的城市
- 获取所在城市的城市码
如果咱们给多集体发送天气情况，这几个人来自不同的城市，那么咱们不可能每次都要输出城市名，而后查找城市码，而后再拜访接口，获取天气情况，这样会十分的麻烦，所以咱们须要思考将城市名跟城市码一一对应起来，说到一一对应，首先想到的数据结构便是字典，所以咱们能够将这些信息存入一个字典里，而后长久化到一个文件中，这样便不便很多
首先咱们获取最新的 city 表，这个表是一个 list 类型，大体格局如下：
[ { "id": 1, "pid": 0, "city_code": "101010100", "city_name": "北京", "post_code": "100000", "area_code": "010", "ctime": "2019-07-11 17:30:06" }, { "id": 2, "pid": 0, "city_code": "", "city_name": "安徽", "post_code": null, "area_code": null, "ctime": null }]咱们就简略的粘贴复制，放到一个空的列表中，如下所示，将所有的城市信息放到列表 citycode 中
citycode = [ { "id": 1, "pid": 0, "city_code": "101010100", "city_name": "北京", "post_code": "100000", "area_code": "010", "ctime": "2019-07-11 17:30:06" },.................. { "id": 2, "pid": 0, "city_code": "None", "city_name": "安徽", "post_code": "null", "area_code": "null", "ctime": "null" }]cityinfo = {}#将城市名和城市代码写入json文件中with open('city_for_code.json','w',encoding='utf-8') as f: for i in citycode: name = i["city_name"] code = i["city_code"] cityinfo[name] = code f.write(str(cityinfo))#测试是否能读取with open('city_for_code.json','r+',encoding='utf-8') as file: data_dst = file.readlines() d = eval(data_dst[0])而后就是一顿解决，只把咱们所需的 city_name 和 city_code 这俩字段取出即可，随后写入文件中。如果读取的话就依照下面办法去读取，须要留神的是，应用 open()办法读取文件，失去的内容是一个列表，咱们须要通过 eval()办法转化成 dict 类型。
这是把 city_name 和 city_code 放到一个文件中的办法，另外咱们也能够放到数据库中，这里以 MySQL 为例，装置 PyMySQL 模块
import pymysqldb_parames = { 'host': 'localhost', 'user': 'root', 'password': '123456', 'database': 'city_code_info'}#连贯数据库conn = pymysql.connect(**db_parames)#创立游标对象，增删改查都在游标上进行cursor = conn.cursor()#表存在，就删除cursor.execute("DROP TABLE IF EXISTS city_code")#建表语句create_table_sql = """CREATE TABLE `city_code` ( `city_name` varchar(20) DEFAULT NULL, `city_code` varchar(25) DEFAULT NULL) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4;"""#建表cursor.execute(create_table_sql)#插入数据with open('city_for_code.json','r+',encoding='utf-8') as f: origin_data = f.readlines() current_data = eval(origin_data[0]) #读取的内容是一个列表，且只蕴含一个元素 #print(current_data.get('北京','Not Exists.')) for name, code in current_data.items(): sql = """INSERT INTO city_code(city_name, city_code) VALUES ('%s', '%s')""" % (name, code) try: cursor.execute(sql) except: conn.rollback() conn.commit() conn.close()执行这个 python 程序就能够将文件中的城市名跟城市码存到库中，当然咱们也能够间接获取到城市名和城市码，而后跳过文件长久化这一步，间接把这两个字段取出存进去，然而思考着代码要多练多写，就多此一举了一下。
上面是输出城市名就能失去城市码的代码块：
import pymysqldef get_city_code(city_name): db_parames = { 'host': 'localhost', 'user': 'root', 'password': '123456', 'database': 'city_code_info' } #连贯数据库 conn = pymysql.connect(**db_parames) #创立游标对象，增删改查都在游标上进行 cursor = conn.cursor() #创立查问语句 select_sql = "SELECT * FROM city_code where city_name='%s'"%(city_name) try: cursor.execute(select_sql) result = cursor.fetchall() for row in result: city_code = row[1] return city_code except: return "Error: unable fetch data!"而后是依据输出的城市码来获取天气情况：
import requestsdef get_weather(city_name,get_date_time=3): city_code = get_city_code(city_name) url = 'http://t.weather.sojson.com/api/weather/city/%s'%(city_code) header = { 'user-agent': 'Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/74.0.3729.169 Safari/537.36' } response = requests.get(url,header) response.encoding = 'utf-8' weather = response.json() day = {1: '今天', 2: '先天', 3: '大后天'} weather_lst = [] for num in range(get_date_time): City = weather["cityInfo"]["city"] Weatherganmao = weather["data"]["ganmao"] Weatherquality = weather["data"]["quality"] Weathershidu = weather["data"]["shidu"] Weatherwendu = weather["data"]["wendu"] Weatherpm25 = str(weather["data"]["pm25"]) Weatherpm10 = str(weather["data"]["pm10"]) Dateymd = weather["data"]["forecast"][num]["ymd"] Dateweek = weather["data"]["forecast"][num]["week"] Sunrise = weather["data"]["forecast"][num]["sunrise"] Sunset = weather["data"]["forecast"][num]["sunset"] Windfx = weather["data"]["forecast"][num]["fx"] Windf1 = weather["data"]["forecast"][num]["fl"] Weathertype = weather["data"]["forecast"][num]["type"] Weathernotice = weather["data"]["forecast"][num]["notice"] Weatherhigh = weather["data"]["forecast"][num]["high"] Weatherlow = weather["data"]["forecast"][num]["low"] if num == 0: result = '今日天气预报' + '\n' \ + '日期： ' + Dateymd + ' ' + Dateweek + ' ' + City + '\n' \ + '天气： ' + Weathertype + ' ' + Windfx + ' ' + Windf1 + ' ' + Weathernotice + '\n' \ + '以后温度： ' + Weatherwendu + '℃' + '\n' \ + '空气湿度： ' + Weathershidu + '\n' \ + '温度范畴： ' + Weatherlow + '' + '~' + '' + Weatherhigh + '\n' \ + '净化指数： ' + 'PM2.5: ' + Weatherpm25 + ' ' + 'PM10: ' + Weatherpm10 + '\n' \ + '空气质量： ' + Weatherquality + '\n' \ + '日出工夫： ' + Sunrise + '\n' \ + '日落工夫： ' + Sunset + '\n' \ + '舒适提醒： ' + Weatherganmao else: which_day = day.get(num,'超出范围') result = '\n' + which_day + ' ' + '天气预报' + '\n' \ + '日期： ' + Dateymd + ' ' + Dateweek + ' ' + City + '\n' \ + '天气： ' + Weathertype + ' ' + Windfx + ' ' + Windf1 + ' ' + Weathernotice + '\n' \ + '温度范畴： ' + Weatherlow + '' + '~' + '' + Weatherhigh + '\n' \ + '日出工夫： ' + Sunrise + '\n' \ + '日落工夫： ' + Sunset + '\n' \ + '舒适提醒： ' + Weatherganmao weather_lst.append(result) weather_str = '' #因为默认要输入三天的天气情况，所以咱们须要创立一个空字符串，而后每迭代一次，就将天气情况拼接到空字符串中。 for msg in weather_lst: weather_str += msg + '\n' return weather_str上面是发送微信音讯
from wxpy import *def send_wx(city_name, who): bot = Bot(cache_path=True) #bot = Bot(console_qr=2, cache_path='botoo.pkl') my_friend = bot.friends().search(who)[0] msg = get_weather(city_name) try: my_friend.send(msg) except: my_friend = bot.friends().search('fei')[0] my_friend.send(u"发送失败")而后咱们还须要写一个定时器，每隔一段时间便要发送一次
from threading import Timerdef auto_send(): city_name = '设置要发送的城市' friend_list = ['要发送的人'] for who in friend_list: send_wx(city_name,who) global timer timer = Timer(1,auto_send) timer.start()最初执行程序
if __name__ == '__main__': timer = Timer(1,auto_send) timer.start()欢送各位朋友关注我的公众号，来一起学习提高哦
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