下一页 python beautifulsoup

Question

Am new to Python and stuck with the 'next page' logic.

I tried while loop & selenium with chrome nothing worked.

Please shed some light in this -

import requests
from bs4 import BeautifulSoup
import csv 

pages = [ 0 , 25 , 50 , 75]
for page in pages:
    source = requests.get('https://finance.yahoo.com/screener/predefined/day_gainers?count=25&offset={}'.format(page)).text

soup = BeautifulSoup(source , 'lxml') 

for link in soup.find_all("a"):
    table = soup.find("table",{"class":"W(100%)"})
    thead = table.find("thead").find_all("th")
    table_head = [th.text for th in thead]
    #print(table_head)

    table_body = table.find ("tbody").find_all("tr")
        
with open("report.csv" , "a" , newline="") as csv_file:
        csv_write = csv.writer(csv_file)
        csv_write.writerow(table_head)
        
        for tr in table_body:
            table_data = [td.text.strip() for td in tr.find_all('td') ]
            csv_write.writerow(table_data)

Answer 1

I think need to indent your code and its work fine. Here is code:

import requests
from bs4 import BeautifulSoup
import csv

pages = [ 0 , 25 , 50 , 75]
for page in pages:
    
    source = requests.get('https://finance.yahoo.com/screener/predefined/day_gainers?count=25&offset={}'.format(page)).text
    

    soup = BeautifulSoup(source , 'lxml')


    for link in soup.find_all("a"):
        table = soup.find("table",{"class":"W(100%)"})
        thead = table.find("thead").find_all("th")
        table_head = [th.text for th in thead]
        #print(table_head)

        table_body = table.find ("tbody").find_all("tr")

        with open("report.csv" , "a" , newline="") as csv_file:
                csv_write = csv.writer(csv_file)
                csv_write.writerow(table_head)

                for tr in table_body:
                    table_data = [td.text.strip() for td in tr.find_all('td') ]
                    csv_write.writerow(table_data)

Edit For the second for loop getting duplicates value. So remove second for loop. Here is edited code.

import requests
from bs4 import BeautifulSoup
import csv

pages = [ 0,25,50,75 ]
for page in pages:
    source = requests.get('https://finance.yahoo.com/screener/predefined/day_gainers?count=25&offset={}'.format(page)).text
    soup = BeautifulSoup(source , 'lxml')

    table = soup.find("table",{"class":"W(100%)"})
    thead = table.find("thead").find_all("th")
    table_head = [th.text for th in thead]
    table_body = table.find ("tbody").find_all("tr")
    with open("report.csv" , "a" , newline="") as csv_file:
            csv_write = csv.writer(csv_file)
            csv_write.writerow(table_head)
            for tr in table_body:
                table_data = [td.text.strip() for td in tr.find_all('td') ]
                csv_write.writerow(table_data)