老师，我执行了scrapy crawl baidu

parse函数 中只写了 一个print（title）他这样子报错

老师为啥这个有时候find_all直接加这个比如class_='名字'

不能找到咧????????????

老师哪错了，没问题呀???????????

老师，我这里跟你写的一样的，为啥我的他没有保存数据

2022-04-24 09:15:26 [scrapy.utils.log] INFO: Scrapy 2.6.1 started (bot: scrapy03)

2022-04-24 09:15:26 [scrapy.utils.log] INFO: Versions: lxml 4.8.0.0, libxml2 2.9.12, cssselect 1.1.0, parsel 1.6.0, w3lib 1.22.0, Twisted 22.4.0, Python 3.9.2 (tags/v3.9.2:1a79785, Feb 19 2021, 13:44:55) [MSC v.1928 64 bit (AMD64)], pyOpenSSL 22.0.0 (OpenSSL 1.1.1m  14 Dec 2021), cryptography 36.0.1, Platform Windows-10-10.0.22000-SP0

2022-04-24 09:15:26 [scrapy.crawler] INFO: Overridden settings:

{'BOT_NAME': 'scrapy03',

 'DOWNLOAD_DELAY': 3,

 'NEWSPIDER_MODULE': 'scrapy03.spiders',

 'SPIDER_MODULES': ['scrapy03.spiders'],

 'USER_AGENT': 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 '

               '(KHTML, like Gecko) Chrome/99.0.4844.35 Safari/537.36'}

2022-04-24 09:15:26 [scrapy.utils.log] DEBUG: Using reactor: twisted.internet.selectreactor.SelectReactor

2022-04-24 09:15:26 [scrapy.extensions.telnet] INFO: Telnet Password: 9a28e1c3964e206e

2022-04-24 09:15:26 [scrapy.middleware] INFO: Enabled extensions:

['scrapy.extensions.corestats.CoreStats',

 'scrapy.extensions.telnet.TelnetConsole',

 'scrapy.extensions.logstats.LogStats']

2022-04-24 09:15:27 [scrapy.middleware] INFO: Enabled downloader middlewares:

['scrapy.downloadermiddlewares.httpauth.HttpAuthMiddleware',

 'scrapy.downloadermiddlewares.downloadtimeout.DownloadTimeoutMiddleware',

 'scrapy.downloadermiddlewares.defaultheaders.DefaultHeadersMiddleware',

 'scrapy.downloadermiddlewares.useragent.UserAgentMiddleware',

 'scrapy.downloadermiddlewares.retry.RetryMiddleware',

 'scrapy.downloadermiddlewares.redirect.MetaRefreshMiddleware',

 'scrapy.spidermiddlewares.offsite.OffsiteMiddleware',

 'scrapy.spidermiddlewares.referer.RefererMiddleware',

 'scrapy.spidermiddlewares.urllength.UrlLengthMiddleware',

 'scrapy.spidermiddlewares.depth.DepthMiddleware']

2022-04-24 09:15:27 [scrapy.middleware] INFO: Enabled item pipelines:

['scrapy03.pipelines.XSPipeline']

2022-04-24 09:15:27 [scrapy.core.engine] INFO: Spider opened

2022-04-24 09:15:27 [scrapy.extensions.logstats] INFO: Crawled 0 pages (at 0 pages/min), scraped 0 items (at 0 items/min) 

2022-04-24 09:15:27 [scrapy.extensions.telnet] INFO: Telnet console listening on 127.0.0.1:6023

2022-04-24 09:15:40 [filelock] DEBUG: Attempting to acquire lock 1927152576880 on C:\Users\zhangpei\AppData\Local\Programs\Python\Python39\lib\site-packages\tldextract\.suffix_cache/publicsuffix.org-tlds\de84b5ca2167d4c83e38fb162f2e8738.tldextract.json.lock

2022-04-24 09:15:40 [filelock] DEBUG: Lock 1927152576880 acquired on C:\Users\zhangpei\AppData\Local\Programs\Python\Python39\lib\site-packages\tldextract\.suffix_cache/publicsuffix.org-tlds\de84b5ca2167d4c83e38fb162f2e8738.tldextract.json.lock

2022-04-24 09:15:40 [filelock] DEBUG: Attempting to release lock 1927152576880 on C:\Users\zhangpei\AppData\Local\Programs\Python\Python39\lib\site-packages\tldextract\.suffix_cache/publicsuffix.org-tlds\de84b5ca2167d4c83e38fb162f2e8738.tldextract.json.lock

2022-04-24 09:15:40 [filelock] DEBUG: Lock 1927152576880 released on C:\Users\zhangpei\AppData\Local\Programs\Python\Python39\lib\site-packages\tldextract\.suffix_cache/publicsuffix.org-tlds\de84b5ca2167d4c83e38fb162f2e8738.tldextract.json.lock

2022-04-24 09:15:40 [scrapy.core.engine] DEBUG: Crawled (200) <GET https://www.qbiqu.com/0_1/> (referer: None)

2022-04-24 09:15:40 [scrapy.spidermiddlewares.offsite] DEBUG: Filtered offsite request to 'www.qbiqu.com': <GET https://www.qbiqu.com/0_1/1.html>

2022-04-24 09:15:40 [scrapy.core.engine] INFO: Closing spider (finished)

2022-04-24 09:15:40 [scrapy.statscollectors] INFO: Dumping Scrapy stats:

{'downloader/request_bytes': 297,

 'downloader/request_count': 1,

 'downloader/request_method_count/GET': 1,

 'downloader/response_bytes': 25899,

 'downloader/response_count': 1,

 'downloader/response_status_count/200': 1,

 'elapsed_time_seconds': 13.305067,

 'finish_reason': 'finished',

 'finish_time': datetime.datetime(2022, 4, 24, 1, 15, 40, 531737),

 'httpcompression/response_bytes': 173927,

 'httpcompression/response_count': 1,

 'log_count/DEBUG': 7,

 'log_count/INFO': 10,

 'offsite/domains': 1,

 'offsite/filtered': 1,

 'request_depth_max': 1,

 'response_received_count': 1,

 'scheduler/dequeued': 1,

 'scheduler/dequeued/memory': 1,

 'scheduler/enqueued': 1,

 'scheduler/enqueued/memory': 1,

 'start_time': datetime.datetime(2022, 4, 24, 1, 15, 27, 226670)}

2022-04-24 09:15:40 [scrapy.core.engine] INFO: Spider closed (finished)

老师为啥这里不用.+贪婪模式

而要用.+?加了个问号咧???????????

老师我的为什么显示正在调试暂停

start()函数是线程Thread自带的吗，他是绑定run方法还是怎么调用啊，我直接使用t1对象的run方法时候，就还是单线程的，start方法是怎么实现的啊？

老师那个 if __name__=='__mane__':

                func1()

是什么意思

老师，爬虫这张资料找在哪，里面找不到

import requests
import re
from fake_useragent import UserAgent

url = 'https://sports.qq.com/'
headers = {'User-Agent':UserAgent().chrome}
resp = requests.get(url,headers = headers)
# print(resp.text)
regx = f'<li><a target="_blank" href=".+?" class=".*">(.+?)</a></li>'
datas = re.findall(regx,resp.text)
for d in datas:
    print(d)

selenium爬取的时候报了这  第二次又好了，这是什么原因导致的呢

老师这里为啥说这个百度访问天气这里的爬虫的url必须有百度的必须的参数???????

不加这个就说网络不行,是反爬机制吗????????

    name = soup.select('h1.name')   #[0].text.strip()
    print(name)

是不是网页的问题，h1.name可以在页面查到，但是读取不到打印出来为空的列表