selenium_example.py

import time

from selenium import webdriver
from selenium.webdriver.common.keys import Keys
from selenium.webdriver.support.ui import WebDriverWait
from selenium.webdriver.support import expected_conditions as EC

with webdriver.Chrome(executable_path=r"./chromedriver") as driver:
    # load main website
    driver.get('https://mops.twse.com.tw/mops/web/t05st09_new')
    original_window = driver.current_window_handle
    # input year and search
    input_element = driver.find_element_by_id('year')
    input_element.send_keys('109')
    input_element.send_keys(Keys.ENTER)
    # wait for new tab opened
    wait = WebDriverWait(driver, 10)
    wait.until(EC.number_of_windows_to_be(2))
    # switch to new tab
    for window_handle in driver.window_handles:
        if window_handle != original_window:
            driver.switch_to.window(window_handle)
            break
    html = driver.page_source
    print(html)