'NoneType' object has no attribute 'find'如何解决？

Question

```python
import requests
from bs4 import BeautifulSoup
import time
import random


def get_html(url):  # 获取网页
    try:
        header = {
            "User-Agent": "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/76.0.3809.100 Safari/537.36",
            "Cookie": "your cookie"}
        html = requests.get(url, headers=header, timeout=5).content
        soup = BeautifulSoup(html.content, 'html.parser')
        return soup
    except Exception as e:
        pass


def xlfirstline(soup):
    get_line = []
    get_jc_a = soup.find('div',class_='jc_a')
    get_tr = get_jc_a.find('tr')
    tr = get_tr.find_all('th')
    for each_th in tr:
        th = each_th.get_text()
        get_line.append(th)
    return get_line


def get_content(soup):
    get_result = []
    get_jc_a = soup.find('div', class_='jc_a')
    tr = get_jc_a.find_all('td')
    for each_td in tr:
        td = each_td.get_text()
        get_result.append(td)
    return get_result


def prt_ret(get_result):
    with open(r'/Users/cenxinxiu/Desktop/国家社科基金项目库.txt', 'a') as f:
        while get_result:
            for i in range(20):
                f.write(get_result.pop(0) + '\t')
            f.write('\n')


def main():
    url = 'http://fz.people.com.cn/skygb/sk/index.php/index/index/'
    soup = get_html(url)
    xlfirstline(soup)
    get_line = xlfirstline(soup)
    prt_ret(get_line)
    for i in range(3):
        wait_time = random.randint(5, 10)
        time.sleep(wait_time)
        url = "http://fz.people.com.cn/skygb/sk/index.php/index/index/" + str(i + 1)
        soup = get_html(url)
        get_result = get_content(soup)
        prt_ret(get_result)


if __name__ == "__main__":
    main()

Traceback (most recent call last):
  line 64, in <module>
    main()
line 51, in main
    xlfirstline(soup)
 line 21, in xlfirstline
    get_jc_a = soup.find('div', class_='jc_a')
AttributeError: 'NoneType' object has no attribute 'find'

Answer 1

你最好打印一下get_html函数，看一下返回对象soup是否有值，你这显示是没有值的，应该是get_html函数里出现异常 执行了pass.导致soup为空