1

我一直在尝试从 python 脚本文件运行 scrapy，因为我需要获取数据并将其保存到我的数据库中。但是当我用scrapy命令运行它时

scrapy crawl argos

该脚本运行良好，但是当我尝试使用脚本运行它时，请按照此链接

http://doc.scrapy.org/en/latest/topics/practices.html#run-scrapy-from-a-script

我得到这个错误

$ python pricewatch/pricewatch.py update
Traceback (most recent call last):
  File "pricewatch/pricewatch.py", line 39, in <module>
    main()
  File "pricewatch/pricewatch.py", line 31, in main
    update()
  File "pricewatch/pricewatch.py", line 24, in update
    setup_crawler("argos.co.uk")
  File "pricewatch/pricewatch.py", line 13, in setup_crawler
    settings = get_project_settings()
  File "/Library/Python/2.7/site-packages/Scrapy-0.22.2-py2.7.egg/scrapy/utils/project.py", line 58, in get_project_settings
    settings_module = import_module(settings_module_path)
  File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/importlib/__init__.py", line 37, in import_module
    __import__(name)
ImportError: No module named settings

我无法理解为什么它没有找到 get_project_setting() 但在终端上使用 scrapy 命令运行良好

这是我的项目的屏幕截图

在此处输入图像描述

这是 pricewatch.py​​ 代码：

import commands
import sys
from database import DBInstance
from twisted.internet import reactor
from scrapy.crawler import Crawler
from scrapy import log
from spiders.argosspider import ArgosSpider
from scrapy.utils.project import get_project_settings
import settings

def setup_crawler(domain):
    spider = ArgosSpider(domain=domain)
    settings = get_project_settings()
    crawler = Crawler(settings)
    crawler.configure()
    crawler.crawl(spider)
    crawler.start()

def update():
    #print "Enter a product to update:"
    #product = raw_input()
    #print product
    #db = DBInstance()
    setup_crawler("argos.co.uk")
    log.start()
    reactor.run()

def main():
    try:
        if sys.argv[1] == "update":
            update()
        elif sys.argv[1] == "database":
            #db = DBInstance()
    except IndexError:
        print "You must select a command from Update, Search, History"


if  __name__ =='__main__':
    main()
4

2 回答 2

2

我已经修复了它只需要将 pricewatch.py​​ 放到项目的顶级目录然后运行它就可以解决它

于 2014-05-09T22:04:57.720 回答
0

这个答案大量复制了这个答案，我相信它回答了你的问题，并另外提供了一个下降的例子。

考虑一个具有以下结构的项目。

my_project/
    main.py                 # Where we are running scrapy from
    scraper/
        run_scraper.py               #Call from main goes here
        scrapy.cfg                   # deploy configuration file
        scraper/                     # project's Python module, you'll import your code from here
            __init__.py
            items.py                 # project items definition file
            pipelines.py             # project pipelines file
            settings.py              # project settings file
            spiders/                 # a directory where you'll later put your spiders
                __init__.py
                quotes_spider.py     # Contains the QuotesSpider class

基本上，该命令 scrapy startproject scraper在 my_project 文件夹中执行，我已将一个run_scraper.py文件添加到外部刮刀文件夹，将一个main.py文件添加到我的根文件夹和quotes_spider.pyspiders 文件夹。

我的主文件：

from scraper.run_scraper import Scraper
scraper = Scraper()
scraper.run_spiders()

我的run_scraper.py文件：

from scraper.scraper.spiders.quotes_spider import QuotesSpider
from scrapy.crawler import CrawlerProcess
from scrapy.utils.project import get_project_settings
import os


class Scraper:
    def __init__(self):
        settings_file_path = 'scraper.scraper.settings' # The path seen from root, ie. from main.py
        os.environ.setdefault('SCRAPY_SETTINGS_MODULE', settings_file_path)
        self.process = CrawlerProcess(get_project_settings())
        self.spiders = QuotesSpider # The spider you want to crawl

    def run_spiders(self):
        self.process.crawl(self.spider)
        self.process.start()  # the script will block here until the crawling is finished

另外，请注意设置可能需要查看，因为路径需要根据根文件夹（my_project，而不是 scraper）。所以在我的情况下：

SPIDER_MODULES = ['scraper.scraper.spiders']
NEWSPIDER_MODULE = 'scraper.scraper.spiders'

ETC...

于 2018-09-11T12:00:40.227 回答