[已解决]爬虫问题显示语法错误，求解答一下

朝歌夜弦

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)

def search():
    try:
        browser.get('https://www.tmall.com')
        input = wait.until(
            EC.presence_of_element_located((By.CSS_SELECTOR, "#mq"))
        )
        submit = wait.until(EC.element_to_be_clickable((By.CSS_SELECTOR,'#mallSearch > form > fieldset       > div > button')))
        input.send_keys('美食')
        submit.click()
        total = wait.until(EC.presence_of_element_located((By.CSS_SELECTOR,'#content > div > div.ui-page > div > b.ui-page-skip > form ')))
        return total.text
    except TimeoutException:   
        return search()

def next_page(page_number):
    try:
        input = wait.until(
            EC.presence_of_element_located((By.CSS_SELECTOR, "#content > div > div.ui-page > div > b.ui-page-skip > form > input.ui-page-skipTo"))
        )
        submit = wait.until(
            EC.element_to_be_clickable((By.CSS_SELECTOR, '#content > div > div.ui-page > div > b.ui-page-skip > form > button')))
        input.clear()
        input.send_keys('page_number')
        submit.click()
        wait.until(EC.text_to_be_present_in_element((By.CSS_SELECTOR,'#content > div > div.ui-page > div > b.ui-page-num > b.ui-page-cur',str(page_number)))
    except TimeoutException:
        next_page(page_number)

def main():
    total = search()
    total = int(re.compile('(\d+)').search(total).group(1))
    for i in range(2,total + 1):
        next_page(i)

if __name__ == '__main__':
    main()


报错信息
   except TimeoutException:
         ^
SyntaxError: invalid syntax

最佳答案

月排行榜 / 总排行榜

zltzlt

2019-10-17 19:51:14

这一句：

1. total = wait.until(EC.presence_of_element_located((By.CSS_SELECTOR,'#content > div > div.ui-page > div > b.ui-page-skip > form ')))

复制代码

末尾少了个右括号，补上就 OK。

1. from selenium import webdriver
   
2. from selenium.webdriver.common.by import By
   
3. from selenium.webdriver.support.ui import WebDriverWait
   
4. from selenium.webdriver.support import expected_conditions as EC
   
5. import re
   
6. 
   
7. browser = webdriver.Chrome()
   
8. wait = WebDriverWait(browser,10)
   
9. 
   
10. def search():
    
11.     try:
    
12.         browser.get('https://www.tmall.com')
    
13.         input = wait.until(
    
14.             EC.presence_of_element_located((By.CSS_SELECTOR, "#mq"))
    
15.         )
    
16.         submit = wait.until(EC.element_to_be_clickable((By.CSS_SELECTOR,'#mallSearch > form > fieldset       > div > button')))
    
17.         input.send_keys('美食')
    
18.         submit.click()
    
19.         total = wait.until(EC.presence_of_element_located((By.CSS_SELECTOR,'#content > div > div.ui-page > div > b.ui-page-skip > form ')))
    
20.         return total.text
    
21.     except TimeoutException:   
    
22.         return search()
    
23. 
    
24. def next_page(page_number):
    
25.     try:
    
26.         input = wait.until(
    
27.             EC.presence_of_element_located((By.CSS_SELECTOR, "#content > div > div.ui-page > div > b.ui-page-skip > form > input.ui-page-skipTo"))
    
28.         )
    
29.         submit = wait.until(
    
30.             EC.element_to_be_clickable((By.CSS_SELECTOR, '#content > div > div.ui-page > div > b.ui-page-skip > form > button')))
    
31.         input.clear()
    
32.         input.send_keys('page_number')
    
33.         submit.click()
    
34.         wait.until(EC.text_to_be_present_in_element((By.CSS_SELECTOR,'#content > div > div.ui-page > div > b.ui-page-num > b.ui-page-cur',str(page_number))))
    
35.     except TimeoutException:
    
36.         next_page(page_number)
    
37. 
    
38. def main():
    
39.     total = search()
    
40.     total = int(re.compile('(\d+)').search(total).group(1))
    
41.     for i in range(2,total + 1):
    
42.         next_page(i)
    
43. 
    
44. if __name__ == '__main__':
    
45.     main()

复制代码

跳转到最佳答案楼层

zltzlt

这一句：

1. total = wait.until(EC.presence_of_element_located((By.CSS_SELECTOR,'#content > div > div.ui-page > div > b.ui-page-skip > form ')))

复制代码

末尾少了个右括号，补上就 OK。

1. from selenium import webdriver
   
2. from selenium.webdriver.common.by import By
   
3. from selenium.webdriver.support.ui import WebDriverWait
   
4. from selenium.webdriver.support import expected_conditions as EC
   
5. import re
   
6. 
   
7. browser = webdriver.Chrome()
   
8. wait = WebDriverWait(browser,10)
   
9. 
   
10. def search():
    
11.     try:
    
12.         browser.get('https://www.tmall.com')
    
13.         input = wait.until(
    
14.             EC.presence_of_element_located((By.CSS_SELECTOR, "#mq"))
    
15.         )
    
16.         submit = wait.until(EC.element_to_be_clickable((By.CSS_SELECTOR,'#mallSearch > form > fieldset       > div > button')))
    
17.         input.send_keys('美食')
    
18.         submit.click()
    
19.         total = wait.until(EC.presence_of_element_located((By.CSS_SELECTOR,'#content > div > div.ui-page > div > b.ui-page-skip > form ')))
    
20.         return total.text
    
21.     except TimeoutException:   
    
22.         return search()
    
23. 
    
24. def next_page(page_number):
    
25.     try:
    
26.         input = wait.until(
    
27.             EC.presence_of_element_located((By.CSS_SELECTOR, "#content > div > div.ui-page > div > b.ui-page-skip > form > input.ui-page-skipTo"))
    
28.         )
    
29.         submit = wait.until(
    
30.             EC.element_to_be_clickable((By.CSS_SELECTOR, '#content > div > div.ui-page > div > b.ui-page-skip > form > button')))
    
31.         input.clear()
    
32.         input.send_keys('page_number')
    
33.         submit.click()
    
34.         wait.until(EC.text_to_be_present_in_element((By.CSS_SELECTOR,'#content > div > div.ui-page > div > b.ui-page-num > b.ui-page-cur',str(page_number))))
    
35.     except TimeoutException:
    
36.         next_page(page_number)
    
37. 
    
38. def main():
    
39.     total = search()
    
40.     total = int(re.compile('(\d+)').search(total).group(1))
    
41.     for i in range(2,total + 1):
    
42.         next_page(i)
    
43. 
    
44. if __name__ == '__main__':
    
45.     main()

复制代码

朝歌夜弦

zltzlt 发表于 2019-10-17 19:51
这一句：

谢谢大佬，那为什么报错信息显示标红那一行语法错误呢？

zltzlt

朝歌夜弦 发表于 2019-10-17 20:36
谢谢大佬，那为什么报错信息显示标红那一行语法错误呢？

城门失火，殃及池鱼

朝歌夜弦

zltzlt 发表于 2019-10-17 20:36
城门失火，殃及池鱼

O(∩_∩)O