python crawler web page

 npm install  or pip install 插件

import json
import time
from openpyxl import load_workbook
from pip._vendor import requests
from bs4 import BeautifulSoup
import pandas as pd
import re
import xlsxwriter

設置request header

header = {'user-agent': 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) ' 'Chrome/112.0.0.0 Safari/537.36'

定義

exl_name = "abc.xlsx"
sheetname ="sheet_doc"

pandas讀取Excel的URL

pdExl = pd.read_excel("abc.xlsx", engine="openpyxl",index_col=0,usecols='A:Q')

結果寫入Excel

workbook   = xlsxwriter.Workbook('abc.xlsx')worksheet = workbook.add_worksheet('contract')

requests抓取，BeautifulSoup分析

通過Regex提取核心內容

for index, _row in pdExl.iterrows():if _row['url'] is None:continueurl = 'https://www.abc.com'+_row['url']response = requests.get(url, headers=header)soup = BeautifulSoup(response.content, 'html.parser')soup.find(class_="other-info")info_element = soup.find(attrs={'class':'other-info'})if info_element is None or info_element.getText() is None:continueemail = re.search("\w+@\w+.\w+",info_element.getText())if email:worksheet.write(index, 17, email.group(0))else:print('No')workbook.close() 

把Json數據保存到Excel

在現有Excel的基礎上追加內容

response = requests.get(url, headers=header)jsonData = json.loads(response.text)df = pd.DataFrame.from_dict(jsonData["data"])exl_name = "abc.xlsx"
sheetname ="sheet_doc"if not os.path.exists(exl_name):df.to_excel(exl_name, sheet_name=sheetname, index=False)
else:df1 = pd.read_excel(exl_name)df_concat = pd.concat([df1, df], axis=0)df_concat.to_excel(exl_name)