getdata提取数据_getdata函数功能「建议收藏」

import requests
from lxml import etree
import time 

#获取  urls_province
#  获取源码 
headers = {
    "User-Agent":"Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/96.0.4664.45 Safari/537.36"
}
url = r"https://ricedata.cn/variety/"
response = requests.get(url,headers)
response.encoding = "utf-8"

#获取  urls_province
html = etree.HTML(response.text)
results = html.xpath('/html/body//tr[4]/td/div/a/@href')
# 拼接  https://ricedata.cn/variety/ + result
urls_province = ["https://ricedata.cn/variety/"+ result for result in results]

#print(len(urls_province))

#  获取所有的额  privince_pages
privince_pages = []
for url_province in urls_province:
    # 获取  page_urls 以农业部为例   https://ricedata.cn/variety/identified/nation_1.htm
    headers = {
        "User-Agent":"Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/96.0.4664.45 Safari/537.36"
    }
    url = url_province
    response = requests.get(url,headers)
    response.encoding = "utf-8"
    html_page = etree.HTML(response.text)
    #获取  urls_province
    results_page = html_page.xpath('/html/body/table[2]/caption/b/a/@href')
    num = (results_page[-1].split('_')[-1]).split('.')[0]
    num = (results_page[-1].split('_')[-1]).split('.')[0]
    parser = results_page[-1].split(num)
    privince_page = ["https://ricedata.cn/variety/identified/"+parser[0]+str(i)+parser[-1] for i in range(1,int(num)+1)]
    #print(privince_page)
    privince_pages.extend(privince_page)
    time.sleep(0.2)
    
print(len(privince_pages))
    
#  获取地区的具体数据
data_content = []
for privince_page in privince_pages: 
    headers = {
         "User-Agent":"Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/96.0.4664.45 Safari/537.36"
    }
    url = privince_page
    print(privince_page)
    response = requests.get(url,headers)
    response.encoding = "gbk"
    
    contents = etree.HTML(response.text,etree.HTMLParser())
    tr_content = contents.xpath('/html/body/table[2]//tr')    #  /html/body/table[2]/tbody[2]/tr[1]

    content = []
    for tr in tr_content:
        result = tr.xpath('./td/text()')
        content.append(result)
    data_content.extend(content)
    time.sleep(0.2)
    #print(content)
print(len((data_content)))