在Scrapy框架中的items.py的作用 1.可以预先定义好要爬取的字段 items.py import scrapy class TencentItem(scrapy.Item): # define the fields for your item here like: # name = scrapy.Field() """定义好字段,并不代表真正的值,只是占一个位置,用的时候直接赋值就行""" position =
Description The Fields object represents a collection of columns in a table. The term field is synonymous with column. Each table in a database has an ordered collection of fields, there is always at least one field in a table. The ordered collection