Question

我正在尝试从python脚本运行scrapy。我几乎成功了（我认为），但是有些事情行不通。在我的代码中，有一行这样的run_spider(quotes5)。 quotes5是我曾经在cmd：scrapy crawl quotes5中执行过的scrapy的名称。有什么帮助吗？错误是quotes5未定义。

这是我的代码：

import scrapy
from twisted.internet import reactor
from scrapy.crawler import CrawlerRunner
from scrapy.utils.log import configure_logging
import json
import csv
import re
from crochet import setup
from importlib import import_module
from scrapy.utils.project import get_project_settings
setup()


def run_spider(spiderName):
    module_name="WS_Vardata.spiders.{}".format(spiderName)
    scrapy_var = import_module(module_name)   #do some dynamic import of selected spider   
    spiderObj= scrapy_var.QuotesSpider()           #get mySpider-object from spider module
    crawler = CrawlerRunner(get_project_settings())   #from Scrapy docs
    crawler.crawl(spiderObj)  

run_spider(quotes5)

草率代码（quotes_spider.py）：

import scrapy
import json
import csv
import re

class QuotesSpider(scrapy.Spider):
name = "quotes5"

def start_requests(self):
    with open('input.csv','r') as csvf:
        urlreader = csv.reader(csvf, delimiter=',',quotechar='"')
        for url in urlreader:
            if url[0]=="y":
                yield scrapy.Request(url[1])
    #with open('so_52069753_out.csv', 'w') as csvfile:
        #fieldnames = ['Category', 'Type', 'Model', 'SK']
        #writer = csv.DictWriter(csvfile, fieldnames=fieldnames)
        #writer.writeheader()

def parse(self, response):

    regex = re.compile(r'"product"\s*:\s*(.+?\})', re.DOTALL)
    regex1 = re.compile(r'"pathIndicator"\s*:\s*(.+?\})', re.DOTALL)
    source_json1 = response.xpath("//script[contains(., 'var digitalData')]/text()").re_first(regex)
    source_json2 = response.xpath("//script[contains(., 'var digitalData')]/text()").re_first(regex1)
    model_code = response.xpath('//script').re_first('modelCode.*?"(.*)"')

    if source_json1 and source_json2:
        source_json1 = re.sub(r'//[^\n]+', "", source_json1)
        source_json2 = re.sub(r'//[^\n]+', "", source_json2)
        product = json.loads(source_json1)
        path = json.loads(source_json2)
        product_category = product["pvi_type_name"]
        product_type = product["pvi_subtype_name"]
        product_model = path["depth_5"]
        product_name = product["model_name"]


    if source_json1 and source_json2:
        source1 = source_json1[0]
        source2 = source_json2[0]
        with open('output.csv','a',newline='') as csvfile:
            fieldnames = ['Category','Type','Model','Name','SK']
            writer = csv.DictWriter(csvfile, fieldnames=fieldnames)
            if product_category:
                writer.writerow({'Category': product_category, 'Type': product_type, 'Model': product_model, 'Name': product_name, 'SK': model_code})

enter image description here

Answer 1

由于错误提示quote5未定义，因此您需要先定义quote5，然后再将其传递给方法。或者尝试这样的事情：

run_spider(“quotes5”)

编辑：

import WS_Vardata.spiders.quotes_spiders as quote_spider_module
def run_spider(spiderName):
    #get the class from within the module
    spiderClass = getattr(quote_spider_module, spiderName)
    #create the object and your good to go
    spiderObj= spiderClass()
    crawler = CrawlerRunner(get_project_settings())   #from Scrapy docs
    crawler.crawl(spiderObj)  

run_spider("QuotesSpider")

此脚本应与WS_Vardata在同一目录中运行

所以在您的情况下：

- TEST
| the_code.py
| WS_Vardata
   | spiders
     | quotes_spider <= containing QuotesSpider class

从python脚本中运行scrapy程序

1 个答案: