python - 试图让 Scrapy 进入项目以运行 Crawl 命令

Question

我是 Python 和 Scrapy 的新手，正在学习 Scrapy 教程。我已经能够通过使用 DOS 界面并键入以下内容来创建我的项目:

scrapy startproject dmoz

教程后面提到的Crawl命令:

scrapy crawl dmoz.org

但每次我尝试运行它时，我都会收到一条消息，指出这不是一个合法的命令。进一步环顾四周，看起来我需要进入一个项目，而这正是我无法弄清楚的。我尝试将目录更改为我在 startproject 中创建的“dmoz”文件夹，但它根本无法识别 Scrapy。

我确定我遗漏了一些明显的东西，我希望有人能指出来。

Answer 1

您必须在“startproject”文件夹中执行它。如果它找到您的 scrapy.cfg 文件，您将有另一个命令。你可以在这里看到区别:

$ scrapy startproject bar
$ cd bar/
$ ls
bar  scrapy.cfg
$ scrapy
Scrapy 0.12.0.2536 - project: bar

Usage:
  scrapy <command> [options] [args]

Available commands:
  crawl         Start crawling from a spider or URL
  deploy        Deploy project in Scrapyd target
  fetch         Fetch a URL using the Scrapy downloader
  genspider     Generate new spider using pre-defined templates
  list          List available spiders
  parse         Parse URL (using its spider) and print the results
  queue         Deprecated command. See Scrapyd documentation.
  runserver     Deprecated command. Use 'server' command instead
  runspider     Run a self-contained spider (without creating a project)
  server        Start Scrapyd server for this project
  settings      Get settings values
  shell         Interactive scraping console
  startproject  Create new project
  version       Print Scrapy version
  view          Open URL in browser, as seen by Scrapy

Use "scrapy <command> -h" to see more info about a command


$ cd ..
$ scrapy
Scrapy 0.12.0.2536 - no active project

Usage:
  scrapy <command> [options] [args]

Available commands:
  fetch         Fetch a URL using the Scrapy downloader
  runspider     Run a self-contained spider (without creating a project)
  settings      Get settings values
  shell         Interactive scraping console
  startproject  Create new project
  version       Print Scrapy version
  view          Open URL in browser, as seen by Scrapy

Use "scrapy <command> -h" to see more info about a command