scrapy

Scrapy throws an error when run using crawlerprocess

故事扮演 提交于 2020-12-12 05:37:07
问题 I've written a script in python using scrapy to collect the name of different posts and their links from a website. When I execute my script from command line it works flawlessly. Now, my intention is to run the script using CrawlerProcess() . I look for the similar problems in different places but nowhere I could find any direct solution or anything closer to that. However, when I try to run it as it is I get the following error: from stackoverflow.items import StackoverflowItem

[Python爬虫]scrapy-redis快速上手(爬虫分布式改造)

你。 提交于 2020-12-10 09:31:41
作者的话 对Python爬虫如何实现大批量爬取感兴趣的读者可以看下scrapy爬虫框架,并且使用本文的scrapy-redis将你的爬虫升级为分布式爬虫。 前言 阅读本文章,您需要: 了解scrapy爬虫框架,知道scrapy的基本使用,最好已经有了可以单机运行的scrapy爬虫。 了解scrapy-redis可以用来干嘛。 已经尝试了一些反反爬措施后仍然觉得爬取效率太低。 已经看了无数scrapy-redis文章,却和我一样不得要领。(自己太笨) 已经看了无数scrapy-redis文章,被辣鸡文章坑的生活不能自理,到现在还没配置好。(可能还是自己太笨) 提示:本文为快速上手文章,有些操作的具体步骤不详细讲,自行百度通用解法,省略的部分我认为你可以自行解决,如果遇到问题,请留言提问 使用scrapy-redis将scrapy改造为分布式 安装需要的python库和数据库 安装scrapy-redis:pip install scrapy-redis 安装redis:可以仅在master(主)端安装 安装其他数据库(可选):mysql,mangoDB,用来保存大量数据,当然也可以选择不安装。用其他方法处理数据。 提示:请注意版本问题,不要过低。 配置redis master(主)上的redis安装后,需要做以下几件事: 配置redis.conf设置从外网访问:#bind 127.0

pip安装scrapy失败:twisted安装失败 error: Microsoft Visual C++ 14.0 is required.. 解决方法

◇◆丶佛笑我妖孽 提交于 2020-12-09 05:51:04
pip安装scrapy失败:twisted安装失败 error: Microsoft Visual C++ 14.0 is required.. 解决方法 参考文章: (1)pip安装scrapy失败:twisted安装失败 error: Microsoft Visual C++ 14.0 is required.. 解决方法 (2)https://www.cnblogs.com/jinghun/p/9092984.html 备忘一下。 来源: oschina 链接: https://my.oschina.net/u/4438370/blog/4782882

Python Scrapy how to save data in different files

吃可爱长大的小学妹 提交于 2020-12-08 07:56:18
问题 I want to save each quote from http://quotes.toscrape.com/ saved into a csv file (2 field : author, quote). One other necessity is to save these quotes in different files seperated by the page they reside. ie : (page1.csv, page2.csv ...). I have tried to achieve this by declaring feed exports in custom_settings attribute in my spider as shown below. This, however, doesn't even produce a file called page-1.csv . I am a total beginner using scrapy, please try to explain assuming I know little

FormRequest that renders JS content in scrapy shell

时光怂恿深爱的人放手 提交于 2020-12-07 03:41:33
问题 I'm trying to scrape content from this page with the following form data: I need the County: set to Prince George's and DateOfFilingFrom set to 01-01-2000 so I do the following: % scrapy shell In [1]: from scrapy.http import FormRequest In [2]: request = FormRequest(url='https://registers.maryland.gov/RowNetWeb/Estates/frmEstateSearch2.aspx', formdata={'DateOfFilingFrom': '01-01-2000', 'County:': "Prince George's"}) In [3]: response In [4]: But it's not working(response is None) plus, the

FormRequest that renders JS content in scrapy shell

放肆的年华 提交于 2020-12-07 03:39:56
问题 I'm trying to scrape content from this page with the following form data: I need the County: set to Prince George's and DateOfFilingFrom set to 01-01-2000 so I do the following: % scrapy shell In [1]: from scrapy.http import FormRequest In [2]: request = FormRequest(url='https://registers.maryland.gov/RowNetWeb/Estates/frmEstateSearch2.aspx', formdata={'DateOfFilingFrom': '01-01-2000', 'County:': "Prince George's"}) In [3]: response In [4]: But it's not working(response is None) plus, the

FormRequest that renders JS content in scrapy shell

谁都会走 提交于 2020-12-07 03:39:46
问题 I'm trying to scrape content from this page with the following form data: I need the County: set to Prince George's and DateOfFilingFrom set to 01-01-2000 so I do the following: % scrapy shell In [1]: from scrapy.http import FormRequest In [2]: request = FormRequest(url='https://registers.maryland.gov/RowNetWeb/Estates/frmEstateSearch2.aspx', formdata={'DateOfFilingFrom': '01-01-2000', 'County:': "Prince George's"}) In [3]: response In [4]: But it's not working(response is None) plus, the

FormRequest that renders JS content in scrapy shell

房东的猫 提交于 2020-12-07 03:38:52
问题 I'm trying to scrape content from this page with the following form data: I need the County: set to Prince George's and DateOfFilingFrom set to 01-01-2000 so I do the following: % scrapy shell In [1]: from scrapy.http import FormRequest In [2]: request = FormRequest(url='https://registers.maryland.gov/RowNetWeb/Estates/frmEstateSearch2.aspx', formdata={'DateOfFilingFrom': '01-01-2000', 'County:': "Prince George's"}) In [3]: response In [4]: But it's not working(response is None) plus, the

Python核心资料:Django+Scrapy+Hadoop+数据挖掘+机器学习+精选视频(免费领)

给你一囗甜甜゛ 提交于 2020-12-05 16:53:40
现在转 Python 还来得及吗?来得及!目前企业招聘 Python 相关岗位的需求很大,现在上车虽然稍晚,但刚好也是 Python 的红利期。学会 Python 可以做测试开发、运维、Python Web 开发,还可以做爬虫、数据分析、数据挖掘、算法、人工智能等高薪岗位。 最近花了很长时间整理了很多 Python 基础+爬虫+数据挖掘+人工智能核心资料 ,有视频,也有学习文档,遇到问题直接打开文档学一学就好了!今天分享给你!也能给你节省很多时间,底部加好友领取福利吧! 一、Python 基础入门 Python 安装包 Python开发环境、函数应用、文件操作、面向对象、异常处理 二、Python 高级知识点讲解 网络编程、并发编程、数据库 Linux 系统应用 Python 语法进阶 HTML、CSS 三、Web开发精选好文+项目实战 Django 框架环境搭建及入门案例 ORM 原理及数据库配置 项目实战:CSDN 微课商城开发实战 四、Python 爬虫精选好文 网络爬虫基础知识大全 Hader 伪装与模拟登陆 如何使用Scrapy 框架、Middleware中间件 数据持久化储存开发方式 Redis 可视化工具的使用 项目实战:Python分布式爬虫+数据分析 项目实战:2020最新热点反爬机制与绕过 五、数据分析与数据挖掘工具+实战项目 数据分析好助手 Jupyter

为 aiohttp 爬虫注入灵魂

久未见 提交于 2020-12-04 13:23:52
为 aiohttp 爬虫注入灵魂 摄影:产品经理 与产品经理在苏州的小生活 听说过异步爬虫的同学,应该或多或少听说过aiohttp这个库。它通过 Python 自带的async/await实现了异步爬虫。 使用 aiohttp,我们可以通过 requests 的api写出并发量匹敌 Scrapy 的爬虫。 我们在 aiohttp 的官方文档上面,可以看到它给出了一个代码示例,如下图所示: 我们现在稍稍修改一下,来看看这样写爬虫,运行效率如何。 修改以后的代码如下: import asyncio import aiohttp template = 'http://exercise.kingname.info/exercise_middleware_ip/{page}' async def get(session, page): url = template.format(page=page) resp = await session.get(url) print(await resp.text(encoding='utf-8')) async def main(): async with aiohttp.ClientSession() as session: for page in range(100): await get(session, page) loop = asyncio