scrapy 在_init_ function中写入的selenium脚本未执行

6jygbczu  于 2022-11-09  发布在  其他
关注(0)|答案(1)|浏览(125)

我尝试将selenium与scrapy整合，以呈现网站的javascript。我已将selenium自动化程式码放在建构函式中，它会执行按钮按一下，然后剖析函式会从页面抓取数据。但终端机视窗中出现下列错误。程式码：

import scrapy
from scrapy.selector import Selector
from selenium import webdriver
from selenium.webdriver.chrome.options import Options
from shutil import which

class test_2(scrapy.Spider):
    name='test_2'
    #allowed_domains=[]
    start_urls=[
        'https://www.jackjones.in/st-search?q=shoes'
        ]

    def _init_(self):
        print("test-1")
        chrome_options=Options()
        chrome_options.add_argument("--headless")

        driver=webdriver.Chrome("C:/chromedriver")
        driver.set_window(1920,1080)
        driver.get("https://www.jackjones.in/st-search?q=shoes")
        tab=driver.find_elements_by_class_name("st-single-product")
        tab[4].click()

        self.html=driver.page_source
        print("test-2")
        driver.close()

    def parse(self, response):
        print("test-3")
        resp=Selector(text=self.html)
        yield{
            'title':resp.xpath("//h1/text()").get()
        }

似乎编译器在转到parse函数之前未执行init函数，因为两个print语句均未执行，但parse函数中的print语句出现在输出中。
如何解决这个问题？
输出量：

PS C:\Users\Vasu\summer\scrapy_selenium> scrapy crawl test_2
2022-07-01 13:18:30 [scrapy.utils.log] INFO: Scrapy 2.6.1 started (bot: scrapy_selenium)
2022-07-01 13:18:30 [scrapy.utils.log] INFO: Versions: lxml 4.9.0.0, libxml2 2.9.14, cssselect 1.1.0, parsel 1.6.0, 
w3lib 1.22.0, Twisted 22.4.0, Python 3.8.13 (default, Mar 28 2022, 06:59:08) [MSC v.1916 64 bit (AMD64)], pyOpenSSL 
22.0.0 (OpenSSL 1.1.1p  21 Jun 2022), cryptography 37.0.1, Platform Windows-10-10.0.19044-SP0
2022-07-01 13:18:30 [scrapy.crawler] INFO: Overridden settings:
{'BOT_NAME': 'scrapy_selenium',
 'NEWSPIDER_MODULE': 'scrapy_selenium.spiders',
 'SPIDER_MODULES': ['scrapy_selenium.spiders']}
2022-07-01 13:18:30 [scrapy.utils.log] DEBUG: Using reactor: twisted.internet.selectreactor.SelectReactor
2022-07-01 13:18:30 [scrapy.extensions.telnet] INFO: Telnet Password: 168b57499cd07735
2022-07-01 13:18:30 [scrapy.middleware] INFO: Enabled extensions:
['scrapy.extensions.corestats.CoreStats',
 'scrapy.extensions.telnet.TelnetConsole',
 'scrapy.extensions.logstats.LogStats']
2022-07-01 13:18:31 [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.downloadermiddlewares.httpcompression.HttpCompressionMiddleware',
 'scrapy.downloadermiddlewares.redirect.RedirectMiddleware',
 'scrapy.downloadermiddlewares.cookies.CookiesMiddleware',
 'scrapy.downloadermiddlewares.httpproxy.HttpProxyMiddleware',
 'scrapy.downloadermiddlewares.stats.DownloaderStats']
2022-07-01 13:18:31 [scrapy.middleware] INFO: Enabled spider middlewares:
['scrapy.spidermiddlewares.httperror.HttpErrorMiddleware',
 'scrapy.spidermiddlewares.offsite.OffsiteMiddleware',
 'scrapy.spidermiddlewares.referer.RefererMiddleware',
 'scrapy.spidermiddlewares.urllength.UrlLengthMiddleware',
 'scrapy.spidermiddlewares.depth.DepthMiddleware']
2022-07-01 13:18:31 [scrapy.middleware] INFO: Enabled item pipelines:
[]
2022-07-01 13:18:31 [scrapy.core.engine] INFO: Spider opened
2022-07-01 13:18:31 [scrapy.extensions.logstats] INFO: Crawled 0 pages (at 0 pages/min), scraped 0 items (at 0 items/min)
2022-07-01 13:18:31 [scrapy.extensions.telnet] INFO: Telnet console listening on 127.0.0.1:6023
2022-07-01 13:18:31 [filelock] DEBUG: Attempting to acquire lock 1385261511056 on C:\Users\Vasu\anaconda3\envs\sca_sel\lib\site-packages\tldextract\.suffix_cache/publicsuffix.org-tlds\de84b5ca2167d4c83e38fb162f2e8738.tldextract.json.lock
2022-07-01 13:18:31 [filelock] DEBUG: Lock 1385261511056 acquired on C:\Users\Vasu\anaconda3\envs\sca_sel\lib\site-packages\tldextract\.suffix_cache/publicsuffix.org-tlds\de84b5ca2167d4c83e38fb162f2e8738.tldextract.json.lock        
2022-07-01 13:18:32 [filelock] DEBUG: Attempting to release lock 1385261511056 on C:\Users\Vasu\anaconda3\envs\sca_sel\lib\site-packages\tldextract\.suffix_cache/publicsuffix.org-tlds\de84b5ca2167d4c83e38fb162f2e8738.tldextract.json.lock
2022-07-01 13:18:32 [filelock] DEBUG: Lock 1385261511056 released on C:\Users\Vasu\anaconda3\envs\sca_sel\lib\site-packages\tldextract\.suffix_cache/publicsuffix.org-tlds\de84b5ca2167d4c83e38fb162f2e8738.tldextract.json.lock        
2022-07-01 13:18:32 [scrapy.core.engine] DEBUG: Crawled (200) <GET https://www.jackjones.in/st-search?q=shoes> (referer: None)
test-3
2022-07-01 13:18:32 [scrapy.core.scraper] ERROR: Spider error processing <GET https://www.jackjones.in/st-search?q=shoes> (referer: None)
Traceback (most recent call last):
  File "C:\Users\Vasu\anaconda3\envs\sca_sel\lib\site-packages\scrapy\utils\defer.py", line 132, in iter_errback    
    yield next(it)
  File "C:\Users\Vasu\anaconda3\envs\sca_sel\lib\site-packages\scrapy\utils\python.py", line 354, in __next__       
    return next(self.data)
  File "C:\Users\Vasu\anaconda3\envs\sca_sel\lib\site-packages\scrapy\utils\python.py", line 354, in __next__       
    return next(self.data)
  File "C:\Users\Vasu\anaconda3\envs\sca_sel\lib\site-packages\scrapy\core\spidermw.py", line 66, in _evaluate_iterable
    for r in iterable:
  File "C:\Users\Vasu\anaconda3\envs\sca_sel\lib\site-packages\scrapy\spidermiddlewares\offsite.py", line 29, in process_spider_output
    for x in result:
  File "C:\Users\Vasu\anaconda3\envs\sca_sel\lib\site-packages\scrapy\core\spidermw.py", line 66, in _evaluate_iterable
    for r in iterable:
  File "C:\Users\Vasu\anaconda3\envs\sca_sel\lib\site-packages\scrapy\spidermiddlewares\referer.py", line 342, in <genexpr>
    return (_set_referer(r) for r in result or ())
  File "C:\Users\Vasu\anaconda3\envs\sca_sel\lib\site-packages\scrapy\core\spidermw.py", line 66, in _evaluate_iterable
    for r in iterable:
  File "C:\Users\Vasu\anaconda3\envs\sca_sel\lib\site-packages\scrapy\spidermiddlewares\urllength.py", line 40, in <genexpr>
    return (r for r in result or () if _filter(r))
  File "C:\Users\Vasu\anaconda3\envs\sca_sel\lib\site-packages\scrapy\core\spidermw.py", line 66, in _evaluate_iterable
    for r in iterable:
  File "C:\Users\Vasu\anaconda3\envs\sca_sel\lib\site-packages\scrapy\spidermiddlewares\depth.py", line 58, in <genexpr>
    return (r for r in result or () if _filter(r))
  File "C:\Users\Vasu\anaconda3\envs\sca_sel\lib\site-packages\scrapy\core\spidermw.py", line 66, in _evaluate_iterable
    for r in iterable:
  File "C:\Users\Vasu\summer\scrapy_selenium\scrapy_selenium\spiders\test_2.py", line 31, in parse
    resp=Selector(text=self.html)
AttributeError: 'test_2' object has no attribute 'html'
2022-07-01 13:18:32 [scrapy.core.engine] INFO: Closing spider (finished)
2022-07-01 13:18:32 [scrapy.statscollectors] INFO: Dumping Scrapy stats:
{'downloader/request_bytes': 237,
 'downloader/request_count': 1,
 'downloader/request_method_count/GET': 1,
 'downloader/response_bytes': 20430,
 'downloader/response_count': 1,
 'downloader/response_status_count/200': 1,
 'elapsed_time_seconds': 0.613799,
 'finish_reason': 'finished',
 'finish_time': datetime.datetime(2022, 7, 1, 7, 48, 32, 202155),
 'httpcompression/response_bytes': 87151,
 'httpcompression/response_count': 1,
 'log_count/DEBUG': 6,
 'log_count/ERROR': 1,
 'log_count/INFO': 10,
 'response_received_count': 1,
 'scheduler/dequeued': 1,
 'scheduler/dequeued/memory': 1,
 'scheduler/enqueued': 1,
 'scheduler/enqueued/memory': 1,
 'spider_exceptions/AttributeError': 1,
 'start_time': datetime.datetime(2022, 7, 1, 7, 48, 31, 588356)}
2022-07-01 13:18:32 [scrapy.core.engine] INFO: Spider closed (finished)
scrapy

1条答案

按热度按时间
qyzbxkaa

qyzbxkaa1#

它是__init__，而不是_init_（请注意双下划线）。
第二，页面上没有h1。请尝试以下方法：

yield {
        'title':resp.xpath("//title/text()").get()
    }
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