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# weather.py
import requests
from bs4 import BeautifulSoup
import csv
import json
def getHTMLtext(url):
"""请求获得网页内容"""
try:
r = requests.get(url, timeout=30)
r.raise_for_status()
r.encoding = r.apparent_encoding
print("成功访问")
return r.text
except:
print("访问错误")
return " "
def get_content(html):
"""处理得到有用信息保存数据文件"""
final = [] # 初始化一个列表保存数据
bs = BeautifulSoup(html, "html.parser") # 创建BeautifulSoup对象
body = bs.body
data = body.find('div', {'id': '7d'}) # 找到div标签且id = 7d
# 下面爬取当天的数据
data2 = body.find_all('div', {'class': 'left-div'})
text = data2[2].find('script').string
text = text[text.index('=') + 1:-2] # 移除改var data=将其变为json数据
jd = json.loads(text)
dayone = jd['od']['od2'] # 找到当天的数据
final_day = [] # 存放当天的数据
count = 0
for i in dayone:
temp = []
if count <= 23:
temp.append(i['od21']) # 添加时间
temp.append(i['od22']) # 添加当前时刻温度
temp.append(i['od24']) # 添加当前时刻风力方向
temp.append(i['od25']) # 添加当前时刻风级
temp.append(i['od26']) # 添加当前时刻降水量
temp.append(i['od27']) # 添加当前时刻相对湿度
temp.append(i['od28']) # 添加当前时刻控制质量
# print(temp)
final_day.append(temp)
count = count + 1
# 下面爬取7天的数据
ul = data.find('ul') # 找到所有的ul标签
li = ul.find_all('li') # 找到左右的li标签
i = 0 # 控制爬取的天数
for day in li: # 遍历找到的每一个li
if i < 7 and i > 0:
temp = [] # 临时存放每天的数据
date = day.find('h1').string # 得到日期
date = date[0:date.index('')] # 取出日期号
temp.append(date)
inf = day.find_all('p') # 找出li下面的p标签,提取第一个p标签的值即天气
temp.append(inf[0].string)
tem_low = inf[1].find('i').string # 找到最低气温
if inf[1].find('span') is None: # 天气预报可能没有最高气温
tem_high = None
else:
tem_high = inf[1].find('span').string # 找到最高气温
temp.append(tem_low[:-1])
if tem_high[-1] == '':
temp.append(tem_high[:-1])
else:
temp.append(tem_high)
wind = inf[2].find_all('span') # 找到风向
for j in wind:
temp.append(j['title'])
wind_scale = inf[2].find('i').string # 找到风级
index1 = wind_scale.index('')
temp.append(int(wind_scale[index1 - 1:index1]))
final.append(temp)
i = i + 1
return final_day, final
# print(final)
def get_content2(html):
"""处理得到有用信息保存数据文件"""
final = [] # 初始化一个列表保存数据
bs = BeautifulSoup(html, "html.parser") # 创建BeautifulSoup对象
body = bs.body
data = body.find('div', {'id': '15d'}) # 找到div标签且id = 15d
ul = data.find('ul') # 找到所有的ul标签
li = ul.find_all('li') # 找到左右的li标签
final = []
i = 0 # 控制爬取的天数
for day in li: # 遍历找到的每一个li
if i < 8:
temp = [] # 临时存放每天的数据
date = day.find('span', {'class': 'time'}).string # 得到日期
date = date[date.index('') + 1:-2] # 取出日期号
temp.append(date)
weather = day.find('span', {'class': 'wea'}).string # 找到天气
temp.append(weather)
tem = day.find('span', {'class': 'tem'}).text # 找到温度
temp.append(tem[tem.index('/') + 1:-1]) # 找到最低气温
temp.append(tem[:tem.index('/') - 1]) # 找到最高气温
wind = day.find('span', {'class': 'wind'}).string # 找到风向
if '' in wind: # 如果有风向变化
temp.append(wind[:wind.index('')])
temp.append(wind[wind.index('') + 1:])
else: # 如果没有风向变化,前后风向一致
temp.append(wind)
temp.append(wind)
wind_scale = day.find('span', {'class': 'wind1'}).string # 找到风级
index1 = wind_scale.index('')
temp.append(int(wind_scale[index1 - 1:index1]))
final.append(temp)
return final
def write_to_csv(file_name, data, day=14):
"""保存为csv文件"""
with open(file_name, 'a', errors='ignore', newline='') as f:
if day == 14:
header = ['日期', '天气', '最低气温', '最高气温', '风向1', '风向2', '风级']
else:
header = ['小时', '温度', '风力方向', '风级', '降水量', '相对湿度', '空气质量']
f_csv = csv.writer(f)
f_csv.writerow(header)
f_csv.writerows(data)
def main():
"""主函数"""
print("Weather test")
# 珠海
url1 = 'http://www.weather.com.cn/weather/101280701.shtml' # 7天天气中国天气网
url2 = 'http://www.weather.com.cn/weather15d/101280701.shtml' # 8-15天天气中国天气网
html1 = getHTMLtext(url1)
data1, data1_7 = get_content(html1) # 获得1-7天和当天的数据
html2 = getHTMLtext(url2)
data8_14 = get_content2(html2) # 获得8-14天数据
data14 = data1_7 + data8_14
# print(data)
write_to_csv('weather14.csv', data14, 14) # 保存为csv文件
write_to_csv('weather1.csv', data1, 1)
if __name__ == '__main__':
main()