某天下班淋雨成了落汤鸡,发了个朋友圈感慨一下啊,然后......
夜深人静之时,突然收到了来自学妹的Py文件,运行之后发现事情并不简单(如下图):
这是暗示我...下次出门给她带把伞?不管那么多,作为一个程序猿,遇到程序先拆解一下。
爬虫:requests
解析:re
UI:tkinter
想要做一个获取天气预报的小程序,第一步要做的就是能够进行天气预报的爬取,这里通过城市名称匹配百度天气的URL进行爬取,并通过正则的方式进行解析,最终以字典的形式返回结果。
class Weather(object):
def __init__(self):
pass
def crawl(self, key):
url = 'http://weathernew.pae.baidu.com/weathernew/pc?query=' + key + '天气&srcid=4982&city_name=' + key + '&province_name=' + key
# 设置请求头
headers = {
'user-agent':
'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/86.0.4240.198 Safari/537.36',
'Referer': 'https://googleads.g.doubleclick.net/'
}
# 页面HTML
res = requests.get(url, headers=headers).text
# 时间
time = re.search(r'\{\"update_time\":\"(.+?)\"', res).group(1)
# 天气
weather = re.search(r'\"weather\"\:\"(.+?)\"', res).group(1)
weather = weather.encode('utf-8').decode("unicode-escape")
# 气温
weather_l = re.search(r'temperature_night\"\:\"(.+?)\"', res).group(1)
weather_h = re.search(r'temperature_day\"\:\"(.+?)\"', res).group(1)
# 风力
wind_now = re.search(r'\"wind_power_day\"\:\"(.+?)\"', res).group(1)
wind_now = wind_now.encode('utf-8').decode("unicode-escape")
wind_name = re.search(r'\"wind_direction_day\"\:\"(.+?)\"',
res).group(1)
wind_name = wind_name.encode('utf-8').decode("unicode-escape")
wind = wind_name + wind_now
# 贴示
desc = re.search(r'\"desc\"\:\"(.+?)\"', res).group(1)
desc = desc.encode('utf-8').decode("unicode-escape")
# 结果生
dic = {
'城市': key,
'更新时间': time,
'天气': weather,
'温度': weather_l + '-' + weather_h + '摄氏度',
'风力': wind,
'贴示': desc,
}
return dic
写好了爬取天气预报的代码之后,下面就可以写一个UI来和输入/爬取的内容进行交互的,写UI的方式大同小异,代码如下:
class Weather_UI(object):
def __init__(self):
self.window = Tk()
self.weather = Weather()
self.window.title(u'天气预报')
# 设置窗口大小和位置
self.window.geometry('310x370')
# 创建一个文本框
self.result_text0 = Label(self.window, text=u'学长所在城市:\n要写中文呦')
self.result_text0.place(x=10, y=5, height=130)
self.result_text0.bind('提示')
self.result_text1 = Text(self.window, background='#ccc')
self.result_text1.place(x=140, y=10, width=155, height=155)
self.result_text1.bind("", self.submit)
# 创建一个按钮
# 为按钮添加事件
self.submit_btn = Button(self.window,
text=u'获取天气',
command=self.submit)
self.submit_btn.place(x=170, y=165, width=70, height=25)
self.submit_btn2 = Button(self.window, text=u'清空', command=self.clean)
self.submit_btn2.place(x=250, y=165, width=35, height=25)
# 标题
self.title_label = Label(self.window, text=u'今日天气:')
self.title_label.place(x=10, y=165)
# 结果
self.result_text = Text(self.window, background='#ccc')
self.result_text.place(x=10, y=190, width=285, height=165)
def submit(self):
# 从输入框获取用户输入的值
content = self.result_text1.get(0.0, END).strip().replace("\n", " ")
# 把城市信息传到爬虫函数中
result = self.weather.crawl(content)
# 将结果显示在窗口中的文本框中
for k, v in result.items():
self.result_text.insert(END, k + ':' + v)
self.result_text.insert(END, '\n')
self.result_text.insert(END, '\n')
# 清空文本域中的内容
def clean(self):
self.result_text1.delete(0.0, END)
self.result_text.delete(0.0, END)
def run(self):
self.window.mainloop()
运行结果如下:
import json
import requests
import re
import tkinter as Tk
from tkinter import Tk, Button, Entry, Label, Text, END
class Weather(object):
def __init__(self):
pass
def crawl(self, key):
url = 'http://weathernew.pae.baidu.com/weathernew/pc?query=' + key + '天气&srcid=4982&city_name=' + key + '&province_name=' + key
# 设置请求头
headers = {
'user-agent':
'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/86.0.4240.198 Safari/537.36',
'Referer': 'https://googleads.g.doubleclick.net/'
}
# 页面HTML
res = requests.get(url, headers=headers).text
# 时间
time = re.search(r'\{\"update_time\":\"(.+?)\"', res).group(1)
# 天气
weather = re.search(r'\"weather\"\:\"(.+?)\"', res).group(1)
weather = weather.encode('utf-8').decode("unicode-escape")
# 气温
weather_l = re.search(r'temperature_night\"\:\"(.+?)\"', res).group(1)
weather_h = re.search(r'temperature_day\"\:\"(.+?)\"', res).group(1)
# 风力
wind_now = re.search(r'\"wind_power_day\"\:\"(.+?)\"', res).group(1)
wind_now = wind_now.encode('utf-8').decode("unicode-escape")
wind_name = re.search(r'\"wind_direction_day\"\:\"(.+?)\"',
res).group(1)
wind_name = wind_name.encode('utf-8').decode("unicode-escape")
wind = wind_name + wind_now
# 贴示
desc = re.search(r'\"desc\"\:\"(.+?)\"', res).group(1)
desc = desc.encode('utf-8').decode("unicode-escape")
# 结果生
dic = {
'城市': key,
'更新时间': time,
'天气': weather,
'温度': weather_l + '-' + weather_h + '摄氏度',
'风力': wind,
'贴示': desc,
}
return dic
class Weather_UI(object):
def __init__(self):
self.window = Tk()
self.weather = Weather()
self.window.title(u'天气预报')
# 设置窗口大小和位置
self.window.geometry('310x370')
# 创建一个文本框
self.result_text0 = Label(self.window, text=u'学长所在城市:\n要写中文呦')
self.result_text0.place(x=10, y=5, height=130)
self.result_text0.bind('提示')
self.result_text1 = Text(self.window, background='#ccc')
self.result_text1.place(x=140, y=10, width=155, height=155)
self.result_text1.bind("", self.submit)
# 创建一个按钮
# 为按钮添加事件
self.submit_btn = Button(self.window,
text=u'获取天气',
command=self.submit)
self.submit_btn.place(x=170, y=165, width=70, height=25)
self.submit_btn2 = Button(self.window, text=u'清空', command=self.clean)
self.submit_btn2.place(x=250, y=165, width=35, height=25)
# 标题
self.title_label = Label(self.window, text=u'今日天气:')
self.title_label.place(x=10, y=165)
# 结果
self.result_text = Text(self.window, background='#ccc')
self.result_text.place(x=10, y=190, width=285, height=165)
def submit(self):
# 从输入框获取用户输入的值
content = self.result_text1.get(0.0, END).strip().replace("\n", " ")
# 把城市信息传到爬虫函数中
result = self.weather.crawl(content)
# 将结果显示在窗口中的文本框中
for k, v in result.items():
self.result_text.insert(END, k + ':' + v)
self.result_text.insert(END, '\n')
self.result_text.insert(END, '\n')
# 清空文本域中的内容
def clean(self):
self.result_text1.delete(0.0, END)
self.result_text.delete(0.0, END)
def run(self):
self.window.mainloop()
A = Weather_UI()
A.run()