Python 自动化测试chrome driver（模拟浏览器进行爬取淘宝商品信息）

from selenium import webdriver
from selenium.webdriver.common.by import By
from selenium.webdriver.support.ui import WebDriverWait
from selenium.webdriver.support import expected_conditions as EC
import re
browser = webdriver.Chrome()
wait=WebDriverWait(browser, 10)
#print(browser.page_source)
def search():
try:
browser.get('https://www.taobao.com/')
input = wait.until(EC.presence_of_element_located((By.CSS_SELECTOR, '#q')))
submit= wait.until(EC.element_to_be_clickable((By.CSS_SELECTOR,'#J_TSearchForm > div.search-button > button')))
input.send_keys("美食")
submit.click()

total=wait.until(EC.presence_of_element_located((By.CSS_SELECTOR, '#mainsrp-pager > div > div > div > div.total')))
return total.text
except TimeoutError:
return search()
def next_page(page_number):
try:
input = wait.until(EC.presence_of_element_located((By.CSS_SELECTOR, '#mainsrp-pager > div > div > div > div.form > input')))
submit = wait.until(EC.element_to_be_clickable((By.CSS_SELECTOR, '#mainsrp-pager > div > div > div > div.form > span.btn.J_Submit')))
input.clear()    #清除页码
input.send_keys(page_number)
submit.click()
wait.until(EC.text_to_be_present_in_element((By.CSS_SELECTOR,'#mainsrp-pager > div > div > div > ul > li.item.active > span'),str(page_number)))
except TimeoutError:
next_page(page_number)

def get_one_page():
pass
def main():
total=search()
total=int(re.compile('(\d+)').search(total).group(1)) #正则表达式获取页数
for i in range(2,total+1):

next_page(i)
if __name__=='__main__':
main()