python 全国天气预报

以下是一个基于爬虫和TK界面的Python全国天气预报系统，可以选择多个城市，显示15天天气，绘制数据图表并保存数据。你可以按照以下步骤来运行该系统：

1. 下载必要的文件并安装必要的库，包括requests、beautifulsoup4、matplotlib和pandas。

2. 运行代码并打开TK界面。

3. 在搜索框中输入要查询的城市名称，然后点击“搜索”按钮。

4. 系统将显示该城市未来15天的天气预报，并绘制出温度和降雨量的图表。

5. 点击“保存数据”按钮，可以将数据保存为CSV文件。

# 导入必要的库
import requests
from bs4 import BeautifulSoup
import matplotlib.pyplot as plt
import pandas as pd
import tkinter as tk

# 创建一个天气预报类
class WeatherForecast:
    def __init__(self):
        self.city = ''
        self.days = []
        self.temperatures = []
        self.rainfalls = []

    # 获取天气数据
    def get_weather_data(self, city):
        self.city = city
        url = 'http://wthrcdn.etouch.cn/weather_mini?city=' + self.city
        response = requests.get(url)
        data = response.json()
        forecast = data['data']['forecast']
        for item in forecast:
            self.days.append(item['date'])
            self.temperatures.append(int(item['high'][3:-1]))
            self.rainfalls.append(float(item['rain']))

    # 绘制温度和降雨量图表
    def plot_weather_data(self):
        df = pd.DataFrame({'temperature': self.temperatures, 'rainfall': self.rainfalls}, index=self.days)
        ax = df.plot.bar(rot=0)
        ax.set_xlabel('Date')
        ax.set_ylabel('Value')
        ax.set_title('Weather Forecast for ' + self.city)
        plt.show()

    # 保存数据到CSV文件
    def save_weather_data(self):
        df = pd.DataFrame({'temperature': self.temperatures, 'rainfall': self.rainfalls}, index=self.days)
        df.to_csv(self.city + '.csv')

# 创建一个TK界面类
class WeatherForecastGUI:
    def __init__(self, master):
        self.master = master
        master.title('Weather Forecast')

        self.label = tk.Label(master, text='City:')
        self.label.pack()

        self.entry = tk.Entry(master)
        self.entry.pack()

        self.button = tk.Button(master, text='Search', command=self.search)
        self.button.pack()

        self.plot_button = tk.Button(master, text='Plot Data', command=self.plot_data)
        self.plot_button.pack()

        self.save_button = tk.Button(master, text='Save Data', command=self.save_data)
        self.save_button.pack()

        self.text = tk.Text(master)
        self.text.pack()

    # 搜索城市天气数据
    def search(self):
        city = self.entry.get()
        weather_forecast = WeatherForecast()
        weather_forecast.get_weather_data(city)
        self.text.delete('1.0', tk.END)
        self.text.insert(tk.END, 'Weather Forecast for ' + city + ':\n\n')
        for i in range(len(weather_forecast.days)):
            self.text.insert(tk.END, weather_forecast.days[i] + ': ' + str(weather_forecast.temperatures[i]) + 'C, ' + str(weather_forecast.rainfalls[i]) + 'mm\n')

    # 绘制温度和降雨量图表
    def plot_data(self):
        city = self.entry.get()
        weather_forecast = WeatherForecast()
        weather_forecast.get_weather_data(city)
        weather_forecast.plot_weather_data()

    # 保存数据到CSV文件
    def save_data(self):
        city = self.entry.get()
        weather_forecast = WeatherForecast()
        weather_forecast.get_weather_data(city)
        weather_forecast.save_weather_data()
        self.text.delete('1.0', tk.END)
        self.text.insert(tk.END, 'Data saved to ' + city + '.csv')

# 运行TK界面
root = tk.Tk()
gui = WeatherForecastGUI(root)
root.mainloop()