Python实战之制作天气查询软件

import pandas as pd
# 将下载好的文件命名为 'city_code.csv'，并删除 header
file = pd.read_csv('city_code.csv')
# 选取需要的两列信息
file = file.loc[:,['City_ID', 'City_CN']]
# 读取前五行信息
file.head()

# 匹配 City_ID 中的数字
def convert(x):
 pat = re.compile('(\d+)')
 return pat.search(x).group()

file['City_ID_map'] = file['City_ID'].map(convert)

# 建立城市与代码之间的映射关系
def city2id(file):
 code_dict = {}
 key = 'City_CN'
 value = 'City_ID_map'
 for k, v in zip(file[key], file[value]):
 code_dict[k] = v
 return code_dict
code_dict = city2id(file)

# 将所得的字典数据存储为 txt 文件
import json
filename = 'city_code.txt'
with open(filename, 'w') as f:
 json.dump(code_dict, f)

with open(filename, 'r') as f:
 text = json.load(f)

# 天气情况
data = info_json['data']
city = f"城市：{data['city']}\n"
today = data['forecast'][0]
date = f"日期：{today['date']}\n"
now = f"实时温度：{data['wendu']}度\n"
temperature = f"温度：{today['high']} {today['low']}\n"
fengxiang = f"风向：{today['fengxiang']}\n"
type = f"天气：{today['type']}\n"
tips = f"贴士：{data['ganmao']}\n"

def query_weather(code):
 # 模板网页
 html = f'http://wthrcdn.etouch.cn/weather_mini?citykey=[code]'
 
 # 向网页发起请求
 try:
 info = requests.get(html)
 info.encoding = 'utf-8'
 # 捕获 ConnectinError 异常
 except requests.ConnectionError:
 raise 
 
 
 
 # 将获取的数据转换为 json 格式
 try:
 info_json = info.json()
 # 转换失败提示无法查询
 except JSONDecodeError:
 return '无法查询'

# 将 textEdit 设置为只读模式
self.textEdit.setReadOnly(True)
# 将鼠标焦点放在 lineEdit 编辑栏里
self.lineEdit.setFocus()
# 获取 lineEdit 中的文本
city = self.lineEdit.text()
# 设置文本
self.textEdit.setText(info)
# 清空文本
self.lineEdit.clear()

def keyPressEvent(self, e):
# 设置快捷键
 if e.key() == Qt.Key_Return:
 self.queryWeather()